{"title":"Natural Formations","description":"\u003cp\u003eMinerals shaped by geology rather than cutting\u003c\/p\u003e","products":[{"product_id":"other-example-product-1","title":"Blue Fluorite on Matrix · UV Reactive · China","description":"\u003cp data-start=\"245\" data-end=\"370\"\u003e\u003cstrong data-start=\"245\" data-end=\"256\"\u003eWeight:\u003c\/strong\u003e 257 g\u003cbr data-start=\"262\" data-end=\"265\"\u003e\u003cstrong data-start=\"265\" data-end=\"274\"\u003eSize:\u003c\/strong\u003e approx. 7 cm × 10 cm\u003cbr data-start=\"295\" data-end=\"298\"\u003e\u003cstrong data-start=\"298\" data-end=\"309\"\u003eOrigin:\u003c\/strong\u003e China (exact locality unknown)\u003cbr data-start=\"340\" data-end=\"343\"\u003e\u003cstrong data-start=\"343\" data-end=\"361\"\u003eDisplay stand:\u003c\/strong\u003e included\u003c\/p\u003e\n\u003chr data-start=\"372\" data-end=\"375\"\u003e\n\u003ch3 data-start=\"377\" data-end=\"402\"\u003e About This Specimen\u003c\/h3\u003e\n\u003cp data-start=\"403\" data-end=\"573\"\u003eThis is a beautifully formed \u003cstrong data-start=\"432\" data-end=\"465\"\u003eblue fluorite crystal cluster\u003c\/strong\u003e on matrix, showcasing sharp, blocky fluorite crystals with a cool blue to blue-green tone in natural light.\u003c\/p\u003e\n\u003cp data-start=\"575\" data-end=\"873\"\u003eUnder UV, the entire piece transforms — fluorescing a \u003cstrong data-start=\"629\" data-end=\"654\"\u003estrong, electric blue\u003c\/strong\u003e with depth and saturation that is particularly striking across the crystal faces. The fluorescence is even and confident rather than patchy, making this a genuinely eye-catching UV specimen despite its manageable size.\u003c\/p\u003e\n\u003cp data-start=\"875\" data-end=\"1060\"\u003eThis piece has real \u003cstrong data-start=\"895\" data-end=\"917\"\u003ecollector presence\u003c\/strong\u003e: architectural crystal growth, excellent contrast between fluorite and matrix, and a UV reaction that feels deliberate rather than incidental.\u003c\/p\u003e\n\u003chr data-start=\"1062\" data-end=\"1065\"\u003e\n\u003ch3 data-start=\"1067\" data-end=\"1094\"\u003eGeological Formation\u003c\/h3\u003e\n\u003cp data-start=\"1095\" data-end=\"1331\"\u003eFluorite (CaF₂) forms in \u003cstrong data-start=\"1120\" data-end=\"1149\"\u003ehydrothermal environments\u003c\/strong\u003e, where mineral-rich fluids circulate through fractures in the Earth’s crust. As temperature and pressure conditions change, fluorite crystallises into its characteristic cubic form.\u003c\/p\u003e\n\u003cp data-start=\"1333\" data-end=\"1577\"\u003eThe blue colour seen here is caused by \u003cstrong data-start=\"1372\" data-end=\"1412\"\u003etrace impurities and lattice defects\u003c\/strong\u003e, while the intense UV reaction is the result of activator elements within the crystal structure that absorb ultraviolet energy and re-emit it as visible blue light.\u003c\/p\u003e\n\u003cp data-start=\"1579\" data-end=\"1739\"\u003eThis specimen likely formed alongside other hydrothermal minerals, with the matrix acting as the growth surface for successive generations of fluorite crystals.\u003c\/p\u003e\n\u003chr data-start=\"1741\" data-end=\"1744\"\u003e\n\u003ch3 data-start=\"1746\" data-end=\"1779\"\u003eApproximate Geological Age\u003c\/h3\u003e\n\u003cp data-start=\"1780\" data-end=\"1936\"\u003eWhile fluorite itself cannot be directly dated, Chinese fluorite deposits are commonly associated with \u003cstrong data-start=\"1883\" data-end=\"1913\"\u003eMesozoic to early Cenozoic\u003c\/strong\u003e hydrothermal activity.\u003c\/p\u003e\n\u003cp data-start=\"1938\" data-end=\"1999\"\u003e\u003cstrong data-start=\"1938\" data-end=\"1956\"\u003eEstimated age:\u003c\/strong\u003e approximately \u003cstrong data-start=\"1971\" data-end=\"1999\"\u003e50–200 million years old\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"2001\" data-end=\"2099\"\u003eThat means this crystal formed while dinosaurs still roamed — and long before humans ever existed.\u003c\/p\u003e\n\u003chr data-start=\"2101\" data-end=\"2104\"\u003e\n\u003ch3 data-start=\"2106\" data-end=\"2149\"\u003e UV \u0026amp; Visual Notes \u003c\/h3\u003e\n\u003cul data-start=\"2150\" data-end=\"2419\"\u003e\n\u003cli data-start=\"2150\" data-end=\"2189\"\u003e\n\u003cp data-start=\"2152\" data-end=\"2189\"\u003eStrong \u003cstrong data-start=\"2159\" data-end=\"2189\"\u003eblue fluorescence under UV\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2190\" data-end=\"2238\"\u003e\n\u003cp data-start=\"2192\" data-end=\"2238\"\u003eClean crystal faces with natural growth zoning\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2239\" data-end=\"2303\"\u003e\n\u003cp data-start=\"2241\" data-end=\"2303\"\u003eExcellent contrast between daylight appearance and UV response\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2304\" data-end=\"2364\"\u003e\n\u003cp data-start=\"2306\" data-end=\"2364\"\u003eFluorite cubes show good translucency and internal texture\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2365\" data-end=\"2419\"\u003e\n\u003cp data-start=\"2367\" data-end=\"2419\"\u003eDisplays beautifully on a stand from multiple angles\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2421\" data-end=\"2424\"\u003e\n\u003ch3 data-start=\"2426\" data-end=\"2455\"\u003e Rarity \u0026amp; Collectability\u003c\/h3\u003e\n\u003cp data-start=\"2456\" data-end=\"2669\"\u003eFluorite itself is a well-known mineral, but \u003cstrong data-start=\"2501\" data-end=\"2538\"\u003ehigh-quality UV-reactive fluorite\u003c\/strong\u003e with strong, saturated blue fluorescence is \u003cstrong data-start=\"2583\" data-end=\"2611\"\u003eincreasingly collectible\u003c\/strong\u003e, particularly as UV mineral collecting continues to grow.\u003c\/p\u003e\n\u003cp data-start=\"2671\" data-end=\"2728\"\u003eThis specimen sits in a \u003cstrong data-start=\"2695\" data-end=\"2727\"\u003edesirable collector category\u003c\/strong\u003e:\u003c\/p\u003e\n\u003cul data-start=\"2729\" data-end=\"2855\"\u003e\n\u003cli data-start=\"2729\" data-end=\"2757\"\u003e\n\u003cp data-start=\"2731\" data-end=\"2757\"\u003eNot common “bulk fluorite”\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2758\" data-end=\"2778\"\u003e\n\u003cp data-start=\"2760\" data-end=\"2778\"\u003eStrong UV response\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2779\" data-end=\"2806\"\u003e\n\u003cp data-start=\"2781\" data-end=\"2806\"\u003eWell-formed crystal habit\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2807\" data-end=\"2855\"\u003e\n\u003cp data-start=\"2809\" data-end=\"2855\"\u003eDisplay-worthy size without being overwhelming\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2857\" data-end=\"2925\"\u003e\u003cstrong data-start=\"2857\" data-end=\"2875\"\u003eRarity rating:\u003c\/strong\u003e ★★★☆☆ (Uncommon quality rather than rare species)\u003c\/p\u003e\n\u003chr data-start=\"2927\" data-end=\"2930\"\u003e\n\u003ch3 data-start=\"2932\" data-end=\"2948\"\u003eCondition\u003c\/h3\u003e\n\u003cul data-start=\"2949\" data-end=\"3094\"\u003e\n\u003cli data-start=\"2949\" data-end=\"2979\"\u003e\n\u003cp data-start=\"2951\" data-end=\"2979\"\u003eNatural, unpolished specimen\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2980\" data-end=\"3030\"\u003e\n\u003cp data-start=\"2982\" data-end=\"3030\"\u003eMinor natural edge wear consistent with fluorite\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3031\" data-end=\"3059\"\u003e\n\u003cp data-start=\"3033\" data-end=\"3059\"\u003eNo repairs or enhancements\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3060\" data-end=\"3094\"\u003e\n\u003cp data-start=\"3062\" data-end=\"3094\"\u003eCarefully cleaned and stabilised\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"3096\" data-end=\"3099\"\u003e\n\u003ch3 data-start=\"3101\" data-end=\"3133\"\u003eWhy This Piece Is Special\u003c\/h3\u003e\n\u003cp data-start=\"3134\" data-end=\"3270\"\u003eThis is the kind of fluorite that \u003cstrong data-start=\"3168\" data-end=\"3189\"\u003erewards curiosity\u003c\/strong\u003e — calm and elegant in daylight, then suddenly dramatic under UV. It’s ideal for:\u003c\/p\u003e\n\u003cul data-start=\"3271\" data-end=\"3429\"\u003e\n\u003cli data-start=\"3271\" data-end=\"3294\"\u003e\n\u003cp data-start=\"3273\" data-end=\"3294\"\u003eUV mineral collectors\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3295\" data-end=\"3333\"\u003e\n\u003cp data-start=\"3297\" data-end=\"3333\"\u003eDisplay cabinets with mixed lighting\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3334\" data-end=\"3381\"\u003e\n\u003cp data-start=\"3336\" data-end=\"3381\"\u003eCollectors who appreciate structure over size\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3382\" data-end=\"3429\"\u003e\n\u003cp data-start=\"3384\" data-end=\"3429\"\u003eAnyone who loves minerals that \u003cem data-start=\"3415\" data-end=\"3429\"\u003edo something\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Starshine Minerals","offers":[{"title":"Default Title","offer_id":56642298904920,"sku":null,"price":65.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0969\/4304\/7000\/files\/IMG_6446.jpg?v=1770408584"},{"product_id":"other-example-product-2","title":"UV Reactive Calcite with Fluorite | Phosphorescent Specimen | Hubei, China","description":"\u003cp data-end=\"727\" data-start=\"543\"\u003e\u003cstrong data-end=\"554\" data-start=\"543\"\u003eWeight:\u003c\/strong\u003e 1.062 kg\u003cbr data-end=\"566\" data-start=\"563\"\u003e\u003cstrong data-end=\"575\" data-start=\"566\"\u003eSize:\u003c\/strong\u003e approx. 14 × 14 × 7 cm\u003cbr data-end=\"601\" data-start=\"598\"\u003e\u003cstrong data-end=\"614\" data-start=\"601\"\u003eLocality:\u003c\/strong\u003e Hubei Province, China\u003cbr data-end=\"639\" data-start=\"636\"\u003e\u003cstrong data-end=\"658\" data-start=\"639\"\u003eStand included:\u003c\/strong\u003e Yes\u003cbr data-end=\"665\" data-start=\"662\"\u003e\u003cstrong data-end=\"681\" data-start=\"665\"\u003eUV response:\u003c\/strong\u003e Multi-colour fluorescence + phosphorescence\u003c\/p\u003e\n\u003chr data-end=\"732\" data-start=\"729\"\u003e\n\u003ch3 data-end=\"760\" data-start=\"734\"\u003e🌍 About this specimen\u003c\/h3\u003e\n\u003cp data-end=\"959\" data-start=\"761\"\u003eThis is an exceptional, large \u003cstrong data-end=\"848\" data-start=\"791\"\u003eUV-reactive calcite specimen with associated fluorite\u003c\/strong\u003e, displaying dramatic coral-like crystal growth and striking multi-colour fluorescence under ultraviolet light.\u003c\/p\u003e\n\u003cp data-end=\"1324\" data-start=\"961\"\u003eIn daylight, the piece shows soft peach-pink and honeyed calcite formations with a naturally sculptural, reef-like structure. Under UV, it transforms completely — revealing \u003cstrong data-end=\"1191\" data-start=\"1134\"\u003eicy blue, blue-white and electric violet fluorescence\u003c\/strong\u003e, with vivid green pinpoints and areas of \u003cstrong data-end=\"1263\" data-start=\"1233\"\u003enoticeable phosphorescence\u003c\/strong\u003e that continue to glow briefly after the UV light is removed.\u003c\/p\u003e\n\u003cp data-end=\"1526\" data-start=\"1326\"\u003eThe reverse of the specimen features a particularly intense \u003cstrong data-end=\"1403\" data-start=\"1386\"\u003efluorite zone\u003c\/strong\u003e, producing a saturated violet-blue response that anchors the piece visually and makes it especially impressive on display.\u003c\/p\u003e\n\u003chr data-end=\"1531\" data-start=\"1528\"\u003e\n\u003ch3 data-end=\"1568\" data-start=\"1533\"\u003e UV \u0026amp; phosphorescence details\u003c\/h3\u003e\n\u003cul data-end=\"1796\" data-start=\"1569\"\u003e\n\u003cli data-end=\"1624\" data-start=\"1569\"\u003e\n\u003cp data-end=\"1624\" data-start=\"1571\"\u003e\u003cstrong data-end=\"1583\" data-start=\"1571\"\u003eCalcite:\u003c\/strong\u003e strong blue to blue-white fluorescence\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1673\" data-start=\"1625\"\u003e\n\u003cp data-end=\"1673\" data-start=\"1627\"\u003e\u003cstrong data-end=\"1640\" data-start=\"1627\"\u003eFluorite:\u003c\/strong\u003e vivid violet-blue fluorescence\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1731\" data-start=\"1674\"\u003e\n\u003cp data-end=\"1731\" data-start=\"1676\"\u003e\u003cstrong data-end=\"1701\" data-start=\"1676\"\u003eSecondary activators:\u003c\/strong\u003e green pinpoint fluorescence\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1796\" data-start=\"1732\"\u003e\n\u003cp data-end=\"1796\" data-start=\"1734\"\u003e\u003cstrong data-end=\"1754\" data-start=\"1734\"\u003ePhosphorescence:\u003c\/strong\u003e visible afterglow following UV exposure\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"1934\" data-start=\"1798\"\u003eThis combination of colours, textures, and afterglow makes the specimen highly desirable to UV collectors and mineral enthusiasts alike.\u003c\/p\u003e\n\u003chr data-end=\"1939\" data-start=\"1936\"\u003e\n\u003ch3 data-end=\"1968\" data-start=\"1941\"\u003eGeological formation\u003c\/h3\u003e\n\u003cp data-end=\"2145\" data-start=\"1969\"\u003eCalcite and fluorite commonly form together in \u003cstrong data-end=\"2045\" data-start=\"2016\"\u003ehydrothermal environments\u003c\/strong\u003e, where mineral-rich fluids move through fractures in the host rock over long geological timescales.\u003c\/p\u003e\n\u003cp data-end=\"2365\" data-start=\"2147\"\u003eAs conditions such as temperature, pressure, and chemistry shift, different minerals crystallise in stages — resulting here in layered growth, complex crystal habits, and the remarkable UV behaviour seen in this piece.\u003c\/p\u003e\n\u003chr data-end=\"2370\" data-start=\"2367\"\u003e\n\u003ch3 data-end=\"2406\" data-start=\"2372\"\u003e Approximate geological age\u003c\/h3\u003e\n\u003cp data-end=\"2605\" data-start=\"2407\"\u003eThe calcite and fluorite deposits from this region of China are generally associated with \u003cstrong data-end=\"2547\" data-start=\"2497\"\u003eMesozoic to early Cenozoic geological activity\u003c\/strong\u003e, placing the formation of this specimen at approximately:\u003c\/p\u003e\n\u003cp data-end=\"2636\" data-start=\"2607\"\u003e\u003cstrong data-end=\"2636\" data-start=\"2607\"\u003e100–250 million years old\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-end=\"2717\" data-start=\"2638\"\u003eA reminder that this piece represents processes far older than humanity itself.\u003c\/p\u003e\n\u003chr data-end=\"2722\" data-start=\"2719\"\u003e\n\u003ch3 data-end=\"2753\" data-start=\"2724\"\u003e⭐ Rarity \u0026amp; collectability\u003c\/h3\u003e\n\u003cp data-end=\"2945\" data-start=\"2754\"\u003eWhile calcite and fluorite are not rare minerals individually, \u003cstrong data-end=\"2944\" data-start=\"2817\"\u003especimens of this size with strong multi-colour UV fluorescence, phosphorescence, and aesthetic crystal growth are uncommon\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp data-end=\"3134\" data-start=\"2947\"\u003eLarge, well-balanced pieces with both visual beauty and dramatic UV performance — especially with confirmed Chinese localities such as Hubei — are increasingly sought after by collectors.\u003c\/p\u003e\n\u003cp data-end=\"3182\" data-start=\"3136\"\u003eThis is a \u003cstrong data-end=\"3168\" data-start=\"3146\"\u003estatement specimen\u003c\/strong\u003e, suitable as:\u003c\/p\u003e\n\u003cul data-end=\"3318\" data-start=\"3183\"\u003e\n\u003cli data-end=\"3219\" data-start=\"3183\"\u003e\n\u003cp data-end=\"3219\" data-start=\"3185\"\u003eA centrepiece in a UV collection\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"3265\" data-start=\"3220\"\u003e\n\u003cp data-end=\"3265\" data-start=\"3222\"\u003eA display mineral for cabinets or shelves\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"3318\" data-start=\"3266\"\u003e\n\u003cp data-end=\"3318\" data-start=\"3268\"\u003eA high-quality example of fluorescent mineralogy\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-end=\"3323\" data-start=\"3320\"\u003e\n\u003ch3 data-end=\"3347\" data-start=\"3325\"\u003e Care \u0026amp; handling\u003c\/h3\u003e\n\u003cul data-end=\"3549\" data-start=\"3348\"\u003e\n\u003cli data-end=\"3419\" data-start=\"3348\"\u003e\n\u003cp data-end=\"3419\" data-start=\"3350\"\u003eHandle gently — natural crystal edges and terminations are delicate\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"3460\" data-start=\"3420\"\u003e\n\u003cp data-end=\"3460\" data-start=\"3422\"\u003eAvoid prolonged exposure to moisture\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"3549\" data-start=\"3461\"\u003e\n\u003cp data-end=\"3549\" data-start=\"3463\"\u003eStore and display away from direct sunlight to preserve colour and surface integrity\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Starshine Minerals","offers":[{"title":"Default Title","offer_id":56642298937688,"sku":null,"price":225.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0969\/4304\/7000\/files\/IMG_6394.jpg?v=1770403296"},{"product_id":"other-example-product-3","title":"Pyrite on Quartz Cluster — China","description":"\u003cp data-start=\"221\" data-end=\"430\"\u003e\u003cstrong data-start=\"221\" data-end=\"232\"\u003eWeight:\u003c\/strong\u003e 217 g\u003cbr data-start=\"238\" data-end=\"241\"\u003e\u003cstrong data-start=\"241\" data-end=\"258\"\u003eApprox. size:\u003c\/strong\u003e 8 × 7 × 3 cm\u003cbr data-start=\"271\" data-end=\"274\"\u003e\u003cstrong data-start=\"274\" data-end=\"287\"\u003eMinerals:\u003c\/strong\u003e Quartz with Pyrite\u003cbr data-start=\"306\" data-end=\"309\"\u003e\u003cstrong data-start=\"309\" data-end=\"323\"\u003eCondition:\u003c\/strong\u003e Natural, unpolished specimen\u003cbr data-start=\"352\" data-end=\"355\"\u003e\u003cstrong data-start=\"355\" data-end=\"371\"\u003eUV reaction:\u003c\/strong\u003e None observed\u003cbr data-start=\"385\" data-end=\"388\"\u003e\u003cstrong data-start=\"388\" data-end=\"399\"\u003eOrigin:\u003c\/strong\u003e China (exact locality unknown)\u003c\/p\u003e\n\u003chr data-start=\"432\" data-end=\"435\"\u003e\n\u003ch3 data-start=\"437\" data-end=\"456\"\u003e\u003cstrong data-start=\"441\" data-end=\"456\"\u003eDescription\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"458\" data-end=\"649\"\u003eThis natural \u003cstrong data-start=\"471\" data-end=\"509\"\u003eQuartz crystal cluster with Pyrite\u003c\/strong\u003e formed deep underground in a hydrothermal environment, where hot, mineral-rich fluids circulated through fractures in the surrounding rock.\u003c\/p\u003e\n\u003cp data-start=\"651\" data-end=\"1010\"\u003eClear to milky quartz crystals grew first, forming the sharp points and layered crystal structure. Iron- and sulphur-rich fluids later deposited \u003cstrong data-start=\"796\" data-end=\"806\"\u003epyrite\u003c\/strong\u003e, which crystallised into the distinctive brassy-gold cubic forms scattered across the surface of the quartz. The result is a striking contrast between bright white crystal points and metallic gold tones.\u003c\/p\u003e\n\u003cp data-start=\"1012\" data-end=\"1232\"\u003eSome pyrite crystals show \u003cstrong data-start=\"1038\" data-end=\"1071\"\u003eminor natural surface tarnish\u003c\/strong\u003e, which can create subtle iridescent flashes. This is a normal and expected feature of natural pyrite and confirms the specimen has not been treated or enhanced.\u003c\/p\u003e\n\u003chr data-start=\"1234\" data-end=\"1237\"\u003e\n\u003ch3 data-start=\"1239\" data-end=\"1273\"\u003e\u003cstrong data-start=\"1243\" data-end=\"1273\"\u003eApproximate Geological Age\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"1275\" data-end=\"1390\"\u003eQuartz–pyrite mineralisation of this type in China is generally associated with \u003cstrong data-start=\"1355\" data-end=\"1389\"\u003eMesozoic hydrothermal activity\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp data-start=\"1392\" data-end=\"1448\"\u003eThis specimen is estimated to have formed approximately:\u003c\/p\u003e\n\u003cp data-start=\"1450\" data-end=\"1478\"\u003e\u003cstrong data-start=\"1450\" data-end=\"1478\"\u003e90–150 million years ago\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"1480\" data-end=\"1559\"\u003eLong before human history, during a time when dinosaurs still roamed the Earth.\u003c\/p\u003e\n\u003chr data-start=\"1561\" data-end=\"1564\"\u003e\n\u003ch3 data-start=\"1566\" data-end=\"1599\"\u003e\u003cstrong data-start=\"1570\" data-end=\"1599\"\u003eWhy this piece is special\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul data-start=\"1601\" data-end=\"1887\"\u003e\n\u003cli data-start=\"1601\" data-end=\"1670\"\u003e\n\u003cp data-start=\"1603\" data-end=\"1670\"\u003eWell-defined \u003cstrong data-start=\"1616\" data-end=\"1641\"\u003epyrite cubic crystals\u003c\/strong\u003e rather than massive growth\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1671\" data-end=\"1729\"\u003e\n\u003cp data-start=\"1673\" data-end=\"1729\"\u003eDense, natural quartz crystal coverage with good depth\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1730\" data-end=\"1791\"\u003e\n\u003cp data-start=\"1732\" data-end=\"1791\"\u003eStrong visual contrast between quartz and metallic pyrite\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1792\" data-end=\"1837\"\u003e\n\u003cp data-start=\"1794\" data-end=\"1837\"\u003eDisplays beautifully from multiple angles\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1838\" data-end=\"1887\"\u003e\n\u003cp data-start=\"1840\" data-end=\"1887\"\u003eA classic and collectable mineral association\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1889\" data-end=\"1892\"\u003e\n\u003ch3 data-start=\"1894\" data-end=\"1912\"\u003e\u003cstrong data-start=\"1898\" data-end=\"1912\"\u003eCare Notes\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"1914\" data-end=\"2083\"\u003eQuartz is durable, but pyrite should be kept dry. Avoid water, chemicals, or prolonged humidity to preserve the metallic lustre. Handle gently to protect crystal points.\u003c\/p\u003e\n\u003chr data-start=\"2085\" data-end=\"2088\"\u003e\n\u003cp data-start=\"2090\" data-end=\"2155\"\u003e\u003cstrong data-start=\"2090\" data-end=\"2155\"\u003eYou will receive the exact specimen shown in the photographs.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"2157\" data-end=\"2175\"\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cstrong data-start=\"2157\" data-end=\"2167\"\u003ePrice:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e\u003cstrong data-start=\"2168\" data-end=\"2175\"\u003e£58\u003c\/strong\u003e\u003c\/p\u003e","brand":"Starshine Minerals","offers":[{"title":"Default Title","offer_id":56642298970456,"sku":null,"price":58.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0969\/4304\/7000\/files\/IMG_6374.jpg?v=1770391121"},{"product_id":"uv-reactive-alien-agate-geode-hinged-display-specimen","title":"UV Reactive “Alien Agate” Geode | Hinged Display Specimen","description":"\u003ch2 data-start=\"209\" data-end=\"230\"\u003eAbout the Specimen\u003c\/h2\u003e\n\u003cp data-start=\"232\" data-end=\"551\"\u003eThis striking \u003cstrong data-start=\"246\" data-end=\"273\"\u003eUV-reactive agate geode\u003c\/strong\u003e is presented as a naturally split, two-piece specimen, allowing both halves to be displayed open or closed. Supplied under the trade name \u003cem data-start=\"412\" data-end=\"427\"\u003e“Alien Agate”\u003c\/em\u003e, this name reflects the specimen’s unusual internal structure and fluorescence rather than a formal mineral classification.\u003c\/p\u003e\n\u003cp data-start=\"553\" data-end=\"810\"\u003eThe interior reveals a combination of soft blue-grey chalcedony and secondary quartz crystal growth surrounding a darker mineral-rich core. The contrast between textures, colours, and UV response makes this a visually engaging and highly characterful piece.\u003c\/p\u003e\n\u003cul data-start=\"812\" data-end=\"1006\"\u003e\n\u003cli data-start=\"812\" data-end=\"839\"\u003e\n\u003cp data-start=\"814\" data-end=\"839\"\u003e\u003cstrong data-start=\"814\" data-end=\"831\"\u003eTotal weight:\u003c\/strong\u003e 126 g\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"840\" data-end=\"896\"\u003e\n\u003cp data-start=\"842\" data-end=\"896\"\u003e\u003cstrong data-start=\"842\" data-end=\"853\"\u003eFormat:\u003c\/strong\u003e Naturally split agate geode (two pieces)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"897\" data-end=\"946\"\u003e\n\u003cp data-start=\"899\" data-end=\"946\"\u003e\u003cstrong data-start=\"899\" data-end=\"913\"\u003eCondition:\u003c\/strong\u003e Natural, unpolished, untreated\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"947\" data-end=\"1006\"\u003e\n\u003cp data-start=\"949\" data-end=\"1006\"\u003e\u003cstrong data-start=\"949\" data-end=\"962\"\u003eLocality:\u003c\/strong\u003e Unknown (supplier unable to confirm origin)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1008\" data-end=\"1011\"\u003e\n\u003ch2 data-start=\"1013\" data-end=\"1042\"\u003eMeasurements (Approximate)\u003c\/h2\u003e\n\u003cp data-start=\"1044\" data-end=\"1063\"\u003e\u003cstrong data-start=\"1044\" data-end=\"1061\"\u003eClosed geode:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"1064\" data-end=\"1096\"\u003e\n\u003cli data-start=\"1064\" data-end=\"1096\"\u003e\n\u003cp data-start=\"1066\" data-end=\"1096\"\u003e8.5 cm × 6.5 cm × 5 cm (depth)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1098\" data-end=\"1123\"\u003e\u003cstrong data-start=\"1098\" data-end=\"1121\"\u003eTop section (open):\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"1124\" data-end=\"1152\"\u003e\n\u003cli data-start=\"1124\" data-end=\"1152\"\u003e\n\u003cp data-start=\"1126\" data-end=\"1152\"\u003e5 cm × 4 cm × 3 cm (depth)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1154\" data-end=\"1182\"\u003e\u003cstrong data-start=\"1154\" data-end=\"1180\"\u003eBottom section (open):\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"1183\" data-end=\"1223\"\u003e\n\u003cli data-start=\"1183\" data-end=\"1223\"\u003e\n\u003cp data-start=\"1185\" data-end=\"1223\"\u003e6 cm wide × 5.5 cm tall × 5 cm (depth)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1225\" data-end=\"1305\"\u003eMeasurements are approximate due to the natural, irregular form of the specimen.\u003c\/p\u003e\n\u003chr data-start=\"1307\" data-end=\"1310\"\u003e\n\u003ch2 data-start=\"1312\" data-end=\"1328\"\u003eUV Reactivity\u003c\/h2\u003e\n\u003cp data-start=\"1330\" data-end=\"1451\"\u003eThis specimen displays a \u003cstrong data-start=\"1355\" data-end=\"1392\"\u003estrong and attractive UV reaction\u003c\/strong\u003e, best observed under \u003cstrong data-start=\"1414\" data-end=\"1450\"\u003e365nm longwave ultraviolet light\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp data-start=\"1453\" data-end=\"1489\"\u003eObserved UV characteristics include:\u003c\/p\u003e\n\u003cul data-start=\"1490\" data-end=\"1695\"\u003e\n\u003cli data-start=\"1490\" data-end=\"1565\"\u003e\n\u003cp data-start=\"1492\" data-end=\"1565\"\u003eBright \u003cstrong data-start=\"1499\" data-end=\"1521\"\u003egreen fluorescence\u003c\/strong\u003e concentrated within chalcedony-rich zones\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1566\" data-end=\"1620\"\u003e\n\u003cp data-start=\"1568\" data-end=\"1620\"\u003eSofter blue-green glow along internal cavity walls\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1621\" data-end=\"1695\"\u003e\n\u003cp data-start=\"1623\" data-end=\"1695\"\u003eClear contrast between fluorescent interiors and the darker outer rind\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1697\" data-end=\"1764\"\u003eNo phosphorescence has been observed once the UV source is removed.\u003c\/p\u003e\n\u003cp data-start=\"1766\" data-end=\"1861\"\u003eAll UV photographs are taken under controlled conditions and accurately represent the specimen.\u003c\/p\u003e\n\u003chr data-start=\"1863\" data-end=\"1866\"\u003e\n\u003ch2 data-start=\"1868\" data-end=\"1891\"\u003eGeological Formation\u003c\/h2\u003e\n\u003cp data-start=\"1893\" data-end=\"2192\"\u003eAgate is a form of \u003cstrong data-start=\"1912\" data-end=\"1952\"\u003emicrocrystalline quartz (chalcedony)\u003c\/strong\u003e that forms when silica-rich fluids slowly infill cavities within host rock. Over extended geological time, successive silica deposition creates layered chalcedony, often followed by later-stage quartz crystal growth within remaining voids.\u003c\/p\u003e\n\u003cp data-start=\"2194\" data-end=\"2276\"\u003eIn this specimen, uneven silica infill and later mineral deposition have produced:\u003c\/p\u003e\n\u003cul data-start=\"2277\" data-end=\"2428\"\u003e\n\u003cli data-start=\"2277\" data-end=\"2308\"\u003e\n\u003cp data-start=\"2279\" data-end=\"2308\"\u003eIrregular internal cavities\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2309\" data-end=\"2349\"\u003e\n\u003cp data-start=\"2311\" data-end=\"2349\"\u003eMixed chalcedony and quartz textures\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2350\" data-end=\"2428\"\u003e\n\u003cp data-start=\"2352\" data-end=\"2428\"\u003eLocalised concentrations of trace elements responsible for UV fluorescence\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2430\" data-end=\"2538\"\u003eThe unusual internal appearance is the result of \u003cstrong data-start=\"2479\" data-end=\"2507\"\u003enatural growth variation\u003c\/strong\u003e, not treatment or enhancement.\u003c\/p\u003e\n\u003chr data-start=\"2540\" data-end=\"2543\"\u003e\n\u003ch2 data-start=\"2545\" data-end=\"2574\"\u003eApproximate Geological Age\u003c\/h2\u003e\n\u003cp data-start=\"2576\" data-end=\"2700\"\u003eWhile the exact locality is unknown, agates of this type typically form during periods of volcanic or hydrothermal activity.\u003c\/p\u003e\n\u003cp data-start=\"2702\" data-end=\"2756\"\u003eA reasonable geological estimate for this specimen is:\u003c\/p\u003e\n\u003cul data-start=\"2757\" data-end=\"2801\"\u003e\n\u003cli data-start=\"2757\" data-end=\"2801\"\u003e\n\u003cp data-start=\"2759\" data-end=\"2801\"\u003e\u003cstrong data-start=\"2759\" data-end=\"2801\"\u003eApproximately 50–200 million years old\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2803\" data-end=\"2806\"\u003e\n\u003ch2 data-start=\"2808\" data-end=\"2834\"\u003eRarity \u0026amp; Collectability\u003c\/h2\u003e\n\u003cp data-start=\"2836\" data-end=\"3021\"\u003eWhile agate itself is widespread, \u003cstrong data-start=\"2870\" data-end=\"2937\"\u003eUV-reactive agate geodes with strong, concentrated fluorescence\u003c\/strong\u003e are significantly less common — particularly in naturally split, displayable pairs.\u003c\/p\u003e\n\u003cp data-start=\"3023\" data-end=\"3055\"\u003eCollectability features include:\u003c\/p\u003e\n\u003cul data-start=\"3056\" data-end=\"3203\"\u003e\n\u003cli data-start=\"3056\" data-end=\"3094\"\u003e\n\u003cp data-start=\"3058\" data-end=\"3094\"\u003eDistinct internal cavity structure\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3095\" data-end=\"3125\"\u003e\n\u003cp data-start=\"3097\" data-end=\"3125\"\u003eMultiple fluorescent zones\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3126\" data-end=\"3158\"\u003e\n\u003cp data-start=\"3128\" data-end=\"3158\"\u003eNatural two-piece separation\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3159\" data-end=\"3203\"\u003e\n\u003cp data-start=\"3161\" data-end=\"3203\"\u003eUnique character due to unknown locality\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"3205\" data-end=\"3260\"\u003eEach specimen of this type is inherently one of a kind.\u003c\/p\u003e\n\u003chr data-start=\"3262\" data-end=\"3265\"\u003e\n\u003ch2 data-start=\"3267\" data-end=\"3293\"\u003eDisplay \u0026amp; Mounting Note\u003c\/h2\u003e\n\u003cp data-start=\"3295\" data-end=\"3678\"\u003eThis specimen has been \u003cstrong data-start=\"3318\" data-end=\"3369\"\u003eprofessionally mounted with a small metal hinge\u003c\/strong\u003e, which has been \u003cstrong data-start=\"3386\" data-end=\"3406\"\u003esecurely adhered\u003c\/strong\u003e to allow the two natural halves to open and close smoothly.\u003cbr data-start=\"3466\" data-end=\"3469\"\u003eThe hinge is \u003cstrong data-start=\"3482\" data-end=\"3522\"\u003enot part of the geological formation\u003c\/strong\u003e and has been added \u003cstrong data-start=\"3542\" data-end=\"3581\"\u003epurely for display and presentation\u003c\/strong\u003e, ensuring the two matching halves remain together and can be safely displayed as a single piece.\u003c\/p\u003e\n\u003cp data-start=\"3680\" data-end=\"3822\"\u003eThe mounting is clearly visible in the photographs and does not affect the natural surfaces, crystal growth, or UV reactivity of the specimen.\u003c\/p\u003e\n\u003chr data-start=\"3824\" data-end=\"3827\"\u003e\n\u003ch2 data-start=\"3829\" data-end=\"3847\"\u003eCare \u0026amp; Handling\u003c\/h2\u003e\n\u003cul data-start=\"3849\" data-end=\"4085\"\u003e\n\u003cli data-start=\"3849\" data-end=\"3909\"\u003e\n\u003cp data-start=\"3851\" data-end=\"3909\"\u003eHandle with care — natural crystal edges may be delicate\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3910\" data-end=\"3950\"\u003e\n\u003cp data-start=\"3912\" data-end=\"3950\"\u003eAvoid prolonged exposure to moisture\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3951\" data-end=\"3995\"\u003e\n\u003cp data-start=\"3953\" data-end=\"3995\"\u003eClean gently with a soft, dry brush only\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3996\" data-end=\"4085\"\u003e\n\u003cp data-start=\"3998\" data-end=\"4085\"\u003eUV display is safe, but prolonged intense exposure should be avoided for conservation\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Starshine Minerals","offers":[{"title":"Default Title","offer_id":56684507529560,"sku":null,"price":62.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0969\/4304\/7000\/files\/IMG_6620.jpg?v=1770581580"},{"product_id":"purple-fluorite-on-calcite-with-chalcopyrite-uv-reactive-collector-specimen-china-hubei-wuhan-region","title":"Purple Fluorite on Calcite with Chalcopyrite UV Reactive Collector Specimen | China (Hubei \/ Wuhan Region)","description":"\u003ch3 data-start=\"416\" data-end=\"434\"\u003e \u003cmeta charset=\"UTF-8\"\u003e\n\u003c\/h3\u003e\n\u003ch3 data-start=\"526\" data-end=\"548\"\u003eAbout the Specimen\u003c\/h3\u003e\n\u003cp data-start=\"550\" data-end=\"914\"\u003eThis striking purple fluorite specimen features dense, intergrown cubic crystals set across a pale calcite-rich matrix, with additional \u003cstrong data-start=\"686\" data-end=\"725\"\u003enatural chalcopyrite mineralisation\u003c\/strong\u003e visible on the reverse. The fluorite crystals display sharp geometry, stepped growth, and areas of translucency, revealing internal zoning from smoky violet through to clearer lilac tones.\u003c\/p\u003e\n\u003cp data-start=\"916\" data-end=\"1212\"\u003eUnder longwave ultraviolet light, the fluorite exhibits a \u003cstrong data-start=\"974\" data-end=\"1018\"\u003estrong, vivid electric-blue fluorescence\u003c\/strong\u003e, transforming the crystal surface into a dramatic and highly visual display. The surrounding matrix also contributes subtle UV response, adding depth and contrast between crystal and host rock.\u003c\/p\u003e\n\u003cp data-start=\"1214\" data-end=\"1432\"\u003eThis is a well-balanced, visually powerful specimen that presents beautifully in both natural light and UV, making it particularly appealing to collectors who value crystal form, fluorescence, and geological character.\u003c\/p\u003e\n\u003cp data-start=\"1434\" data-end=\"1614\"\u003e\u003cstrong data-start=\"1434\" data-end=\"1451\"\u003eTotal weight:\u003c\/strong\u003e 362 g\u003cbr data-start=\"1457\" data-end=\"1460\"\u003e\u003cstrong data-start=\"1460\" data-end=\"1471\"\u003eFormat:\u003c\/strong\u003e Single natural fluorite cluster on matrix\u003cbr data-start=\"1513\" data-end=\"1516\"\u003e\u003cstrong data-start=\"1516\" data-end=\"1530\"\u003eCondition:\u003c\/strong\u003e Natural, unpolished, untreated\u003cbr data-start=\"1561\" data-end=\"1564\"\u003e\u003cstrong data-start=\"1564\" data-end=\"1577\"\u003eLocality:\u003c\/strong\u003e China (Hubei Province, Wuhan region)\u003c\/p\u003e\n\u003chr data-start=\"1616\" data-end=\"1619\"\u003e\n\u003ch3 data-start=\"1621\" data-end=\"1651\"\u003eMeasurements (Approximate)\u003c\/h3\u003e\n\u003cul data-start=\"1653\" data-end=\"1734\"\u003e\n\u003cli data-start=\"1653\" data-end=\"1702\"\u003e\n\u003cp data-start=\"1655\" data-end=\"1702\"\u003e\u003cstrong data-start=\"1655\" data-end=\"1678\"\u003eOverall dimensions:\u003c\/strong\u003e approx. \u003cstrong\u003e12.5\u003c\/strong\u003e \u003cstrong data-start=\"1687\" data-end=\"1702\"\u003ecm × 9 cm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1703\" data-end=\"1734\"\u003e\n\u003cp data-start=\"1705\" data-end=\"1734\"\u003e\u003cstrong data-start=\"1705\" data-end=\"1715\"\u003eDepth:\u003c\/strong\u003e approx. \u003cstrong data-start=\"1724\" data-end=\"1734\"\u003e2–3 cm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1736\" data-end=\"1816\"\u003eMeasurements are approximate due to the natural, irregular form of the specimen.\u003c\/p\u003e\n\u003chr data-start=\"1818\" data-end=\"1821\"\u003e\n\u003ch3 data-start=\"1823\" data-end=\"1840\"\u003eUV Reactivity\u003c\/h3\u003e\n\u003cp data-start=\"1842\" data-end=\"1970\"\u003eThis specimen displays a \u003cstrong data-start=\"1867\" data-end=\"1910\"\u003estrong and highly saturated UV reaction\u003c\/strong\u003e, best observed under \u003cstrong data-start=\"1932\" data-end=\"1969\"\u003e365 nm longwave ultraviolet light\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp data-start=\"1972\" data-end=\"2008\"\u003eObserved UV characteristics include:\u003c\/p\u003e\n\u003cul data-start=\"2010\" data-end=\"2280\"\u003e\n\u003cli data-start=\"2010\" data-end=\"2078\"\u003e\n\u003cp data-start=\"2012\" data-end=\"2078\"\u003eIntense electric-blue fluorescence across fluorite crystal faces\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2079\" data-end=\"2146\"\u003e\n\u003cp data-start=\"2081\" data-end=\"2146\"\u003eWidespread and consistent response rather than isolated patches\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2147\" data-end=\"2210\"\u003e\n\u003cp data-start=\"2149\" data-end=\"2210\"\u003eSubtle supporting fluorescence from the calcite-rich matrix\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2211\" data-end=\"2280\"\u003e\n\u003cp data-start=\"2213\" data-end=\"2280\"\u003eClear contrast between fluorescent crystals and darker host areas\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2282\" data-end=\"2349\"\u003eNo phosphorescence has been observed once the UV source is removed.\u003c\/p\u003e\n\u003cp data-start=\"2351\" data-end=\"2446\"\u003eAll UV photographs are taken under controlled conditions and accurately represent the specimen.\u003c\/p\u003e\n\u003chr data-start=\"2448\" data-end=\"2451\"\u003e\n\u003ch3 data-start=\"2453\" data-end=\"2477\"\u003eGeological Formation\u003c\/h3\u003e\n\u003cp data-start=\"2479\" data-end=\"2677\"\u003eFluorite forms within \u003cstrong data-start=\"2501\" data-end=\"2530\"\u003ehydrothermal vein systems\u003c\/strong\u003e, where mineral-rich fluids circulate through fractures in host rock and deposit crystals as temperature, pressure, and chemistry change over time.\u003c\/p\u003e\n\u003cp data-start=\"2679\" data-end=\"2747\"\u003eIn this specimen, successive stages of mineral growth have produced:\u003c\/p\u003e\n\u003cul data-start=\"2749\" data-end=\"2916\"\u003e\n\u003cli data-start=\"2749\" data-end=\"2789\"\u003e\n\u003cp data-start=\"2751\" data-end=\"2789\"\u003eWell-defined cubic fluorite crystals\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2790\" data-end=\"2828\"\u003e\n\u003cp data-start=\"2792\" data-end=\"2828\"\u003eLayered and stepped crystal growth\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2829\" data-end=\"2857\"\u003e\n\u003cp data-start=\"2831\" data-end=\"2857\"\u003eCalcite-rich host matrix\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2858\" data-end=\"2916\"\u003e\n\u003cp data-start=\"2860\" data-end=\"2916\"\u003eLater-stage chalcopyrite mineralisation on the reverse\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2918\" data-end=\"3063\"\u003eThe combination of crystal habit, matrix association, and UV response reflects natural geological processes rather than treatment or enhancement.\u003c\/p\u003e\n\u003chr data-start=\"3065\" data-end=\"3068\"\u003e\n\u003ch3 data-start=\"3070\" data-end=\"3100\"\u003eApproximate Geological Age\u003c\/h3\u003e\n\u003cp data-start=\"3102\" data-end=\"3267\"\u003eWhile an exact formation age cannot be assigned to an individual specimen, fluorite deposits of this type typically form during major regional mineralisation events.\u003c\/p\u003e\n\u003cp data-start=\"3269\" data-end=\"3323\"\u003eA reasonable geological estimate for this specimen is:\u003c\/p\u003e\n\u003cul data-start=\"3325\" data-end=\"3370\"\u003e\n\u003cli data-start=\"3325\" data-end=\"3370\"\u003e\n\u003cp data-start=\"3327\" data-end=\"3370\"\u003e\u003cstrong data-start=\"3327\" data-end=\"3370\"\u003eApproximately 100–300 million years old\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"3372\" data-end=\"3375\"\u003e\n\u003ch3 data-start=\"3377\" data-end=\"3404\"\u003eRarity \u0026amp; Collectability\u003c\/h3\u003e\n\u003cp data-start=\"3406\" data-end=\"3621\"\u003eFluorite is a well-known mineral; however, specimens combining \u003cstrong data-start=\"3469\" data-end=\"3591\"\u003estrong cubic crystal form, deep purple colouration, intense UV fluorescence, and secondary chalcopyrite mineralisation\u003c\/strong\u003e are considerably less common.\u003c\/p\u003e\n\u003cp data-start=\"3623\" data-end=\"3655\"\u003eCollectability features include:\u003c\/p\u003e\n\u003cul data-start=\"3657\" data-end=\"3861\"\u003e\n\u003cli data-start=\"3657\" data-end=\"3703\"\u003e\n\u003cp data-start=\"3659\" data-end=\"3703\"\u003eDense, well-formed cubic fluorite crystals\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3704\" data-end=\"3739\"\u003e\n\u003cp data-start=\"3706\" data-end=\"3739\"\u003eStrong longwave UV fluorescence\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3740\" data-end=\"3782\"\u003e\n\u003cp data-start=\"3742\" data-end=\"3782\"\u003eAssociated chalcopyrite on the reverse\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3783\" data-end=\"3813\"\u003e\n\u003cp data-start=\"3785\" data-end=\"3813\"\u003eDisplay-ready natural form\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3814\" data-end=\"3861\"\u003e\n\u003cp data-start=\"3816\" data-end=\"3861\"\u003eClearly documented provenance and condition\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"3863\" data-end=\"4007\"\u003eThis specimen sits comfortably within the \u003cstrong data-start=\"3905\" data-end=\"3933\"\u003ecollector-grade category\u003c\/strong\u003e and would suit both fluorite-focused and UV-reactive mineral collections.\u003c\/p\u003e\n\u003chr data-start=\"4009\" data-end=\"4012\"\u003e\n\u003ch3 data-start=\"4014\" data-end=\"4041\"\u003eDisplay \u0026amp; Mounting Note\u003c\/h3\u003e\n\u003cp data-start=\"4043\" data-end=\"4138\"\u003eThis specimen is supplied \u003cstrong data-start=\"4069\" data-end=\"4137\"\u003ewith the gold-toned metal display stand shown in the photographs\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp data-start=\"4140\" data-end=\"4381\"\u003eThe stand has been selected to complement the specimen’s form and colour and supports it securely for both natural light and UV display. The stand is not part of the geological formation and is included purely for presentation and stability.\u003c\/p\u003e\n\u003chr data-start=\"4383\" data-end=\"4386\"\u003e\n\u003ch3 data-start=\"4388\" data-end=\"4407\"\u003eCare \u0026amp; Handling\u003c\/h3\u003e\n\u003cul data-start=\"4409\" data-end=\"4742\"\u003e\n\u003cli data-start=\"4409\" data-end=\"4494\"\u003e\n\u003cp data-start=\"4411\" data-end=\"4494\"\u003eHandle with care — fluorite has a relatively low hardness and may chip if knocked\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"4495\" data-end=\"4561\"\u003e\n\u003cp data-start=\"4497\" data-end=\"4561\"\u003eAvoid prolonged exposure to direct sunlight to preserve colour\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"4562\" data-end=\"4607\"\u003e\n\u003cp data-start=\"4564\" data-end=\"4607\"\u003eClean gently using a soft, dry brush only\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"4608\" data-end=\"4652\"\u003e\n\u003cp data-start=\"4610\" data-end=\"4652\"\u003eAvoid water soaking or chemical cleaners\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"4653\" data-end=\"4742\"\u003e\n\u003cp data-start=\"4655\" data-end=\"4742\"\u003eUV display is safe, but prolonged intense exposure should be avoided for conservation\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"4744\" data-end=\"4747\"\u003e\n\u003ch3 data-start=\"4749\" data-end=\"4758\"\u003ePrice\u003c\/h3\u003e\n\u003cp data-start=\"4760\" data-end=\"4805\"\u003e\u003cstrong data-start=\"4760\" data-end=\"4771\"\u003e£120.00\u003c\/strong\u003e\u003cbr data-start=\"4771\" data-end=\"4774\"\u003e\u003cem data-start=\"4774\" data-end=\"4805\"\u003e(Gold display stand included)\u003c\/em\u003e\u003c\/p\u003e","brand":"Starshine Minerals","offers":[{"title":"Default Title","offer_id":56695471210840,"sku":null,"price":120.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0969\/4304\/7000\/files\/IMG_7041.jpg?v=1770757866"},{"product_id":"amethyst-with-calcite-rosettes-artigas-uruguay-uv-reactive","title":"Amethyst with Calcite Rosettes – Artigas, Uruguay (UV Reactive)","description":"\u003cp data-start=\"352\" data-end=\"478\"\u003eWeight: 172 g\u003cbr data-start=\"365\" data-end=\"368\"\u003eSize: approx. 9 cm × 7.5 cm × 5.5 cm\u003cbr data-start=\"404\" data-end=\"407\"\u003eDepth: ~3.5 cm\u003cbr data-start=\"421\" data-end=\"424\"\u003eOrigin: Artigas, Uruguay\u003cbr data-start=\"448\" data-end=\"451\"\u003eDisplay stand: not included\u003c\/p\u003e\n\u003chr data-start=\"480\" data-end=\"485\"\u003e\n\u003ch2 data-start=\"487\" data-end=\"509\"\u003eAbout This Specimen\u003c\/h2\u003e\n\u003cp data-start=\"511\" data-end=\"708\"\u003eThis is a richly coloured Uruguayan amethyst plate displaying sharp quartz points emerging from a natural agate base, accompanied by perched calcite rosettes that fluoresce brightly under UV light.\u003c\/p\u003e\n\u003cp data-start=\"710\" data-end=\"931\"\u003eThe crystal habit is tight and architectural rather than open — a classic feature of Artigas material where slow growth inside basalt cavities produces deep colour saturation and glassy faces instead of large pale points.\u003c\/p\u003e\n\u003cp data-start=\"933\" data-end=\"1265\"\u003eAcross the crystal surface sit several pale calcite growths, delicately resting on the amethyst tips. These formed after the quartz had already crystallised, recording a second mineralising event inside the geode. Because of this, the specimen captures multiple stages of geological history rather than a single moment of formation.\u003c\/p\u003e\n\u003cp data-start=\"1267\" data-end=\"1432\"\u003eIn daylight it reads as a strong purple display piece.\u003cbr data-start=\"1321\" data-end=\"1324\"\u003eUnder UV it becomes a contrast specimen — dark violet crystal field with floating white luminescent calcite.\u003c\/p\u003e\n\u003chr data-start=\"1434\" data-end=\"1439\"\u003e\n\u003ch2 data-start=\"1441\" data-end=\"1464\"\u003eGeological Formation\u003c\/h2\u003e\n\u003cp data-start=\"1466\" data-end=\"1621\"\u003eUruguayan amethyst forms inside volcanic basalt flows.\u003cbr data-start=\"1520\" data-end=\"1523\"\u003eGas bubbles trapped in cooling lava create cavities which later fill with silica-rich groundwater.\u003c\/p\u003e\n\u003cp data-start=\"1623\" data-end=\"1671\"\u003eThe formation sequence visible in this specimen:\u003c\/p\u003e\n\u003col data-start=\"1673\" data-end=\"1911\"\u003e\n\u003cli data-start=\"1673\" data-end=\"1742\"\u003e\n\u003cp data-start=\"1676\" data-end=\"1742\"\u003eChalcedony layers deposit first, creating the agate banding base\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1743\" data-end=\"1823\"\u003e\n\u003cp data-start=\"1746\" data-end=\"1823\"\u003eQuartz crystals grow inward, forming amethyst points coloured by trace iron\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1824\" data-end=\"1911\"\u003e\n\u003cp data-start=\"1827\" data-end=\"1911\"\u003eLater fluids re-enter the cavity depositing calcite over the already-formed crystals\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp data-start=\"1913\" data-end=\"2113\"\u003eThis overgrowth relationship is important — it shows the geode reopened after initial crystallisation, making the calcite a secondary mineral phase rather than part of the original growth environment.\u003c\/p\u003e\n\u003cp data-start=\"2115\" data-end=\"2267\"\u003eThe rosette shapes occur because calcite grows along preferred cleavage directions, producing curved layered crystal aggregates instead of sharp prisms.\u003c\/p\u003e\n\u003chr data-start=\"2269\" data-end=\"2274\"\u003e\n\u003ch2 data-start=\"2276\" data-end=\"2305\"\u003eApproximate Geological Age\u003c\/h2\u003e\n\u003cp data-start=\"2307\" data-end=\"2413\"\u003eThe Paraná volcanic province responsible for Uruguay’s amethyst formed during the Early Cretaceous period.\u003c\/p\u003e\n\u003cp data-start=\"2415\" data-end=\"2452\"\u003eEstimated age: ~130 million years old\u003c\/p\u003e\n\u003cp data-start=\"2454\" data-end=\"2550\"\u003eThese crystals began forming while South America and Africa were still separating as continents.\u003c\/p\u003e\n\u003chr data-start=\"2552\" data-end=\"2557\"\u003e\n\u003ch2 data-start=\"2559\" data-end=\"2579\"\u003eUV \u0026amp; Visual Notes\u003c\/h2\u003e\n\u003cp data-start=\"2581\" data-end=\"2917\"\u003e• Calcite fluoresces bright white-blue under longwave UV\u003cbr data-start=\"2637\" data-end=\"2640\"\u003e• Strong contrast against dark amethyst background\u003cbr data-start=\"2690\" data-end=\"2693\"\u003e• Visible agate banding on matrix edge\u003cbr data-start=\"2731\" data-end=\"2734\"\u003e• Saturated purple crystal colour typical of Artigas locality\u003cbr data-start=\"2795\" data-end=\"2798\"\u003e• Attractive triangular natural composition for upright display\u003cbr data-start=\"2861\" data-end=\"2864\"\u003e• Different appearance in daylight vs UV environments\u003c\/p\u003e\n\u003chr data-start=\"2919\" data-end=\"2924\"\u003e\n\u003ch2 data-start=\"2926\" data-end=\"2952\"\u003eRarity \u0026amp; Collectability\u003c\/h2\u003e\n\u003cp data-start=\"2954\" data-end=\"3013\"\u003eAmethyst itself is common — but association pieces are not.\u003c\/p\u003e\n\u003cp data-start=\"3015\" data-end=\"3043\"\u003eWhat elevates this specimen:\u003c\/p\u003e\n\u003cp data-start=\"3045\" data-end=\"3217\"\u003e• Uruguay locality (premium colour locality)\u003cbr data-start=\"3089\" data-end=\"3092\"\u003e• Secondary mineralisation present\u003cbr data-start=\"3126\" data-end=\"3129\"\u003e• Fluorescent response\u003cbr data-start=\"3151\" data-end=\"3154\"\u003e• Clear formation sequence preserved\u003cbr data-start=\"3190\" data-end=\"3193\"\u003e• Balanced display shape\u003c\/p\u003e\n\u003cp data-start=\"3219\" data-end=\"3340\"\u003eCollector category: Association specimen\u003cbr data-start=\"3259\" data-end=\"3262\"\u003eRarity rating: ★★★☆☆ (Uncommon formation combination rather than rare species)\u003c\/p\u003e\n\u003cp data-start=\"3342\" data-end=\"3484\"\u003eThis is the type collectors move toward after standard geode halves — a piece that explains \u003cem data-start=\"3434\" data-end=\"3439\"\u003ehow\u003c\/em\u003e a geode formed, not just what it looks like.\u003c\/p\u003e\n\u003chr data-start=\"3486\" data-end=\"3491\"\u003e\n\u003ch2 data-start=\"3493\" data-end=\"3505\"\u003eCondition\u003c\/h2\u003e\n\u003cp data-start=\"3507\" data-end=\"3648\"\u003e• Natural unpolished specimen\u003cbr data-start=\"3536\" data-end=\"3539\"\u003e• Minor edge contacts typical of geode extraction\u003cbr data-start=\"3588\" data-end=\"3591\"\u003e• No repairs or enhancements\u003cbr data-start=\"3619\" data-end=\"3622\"\u003e• Stable and display ready\u003c\/p\u003e\n\u003cp data-start=\"3650\" data-end=\"3723\"\u003ePlease review photographs carefully as they form part of the description.\u003c\/p\u003e\n\u003chr data-start=\"3725\" data-end=\"3730\"\u003e\n\u003ch2 data-start=\"3732\" data-end=\"3760\"\u003eWhy This Piece Is Special\u003c\/h2\u003e\n\u003cp data-start=\"3762\" data-end=\"3792\"\u003eMany amethysts are decorative.\u003c\/p\u003e\n\u003cp data-start=\"3794\" data-end=\"3817\"\u003eThis one is geological.\u003c\/p\u003e\n\u003cp data-start=\"3819\" data-end=\"4039\"\u003eIt preserves three separate mineral growth events in a single cavity — agate, quartz, then calcite — and the UV response makes that history visible. Instead of just colour, it offers interaction: light changes the story.\u003c\/p\u003e\n\u003cp data-start=\"4041\" data-end=\"4187\"\u003eIdeal for:\u003cbr\u003e• collectors building a locality cabinet\u003cbr data-start=\"4092\" data-end=\"4095\"\u003e• UV mineral displays\u003cbr data-start=\"4116\" data-end=\"4119\"\u003e• educational collections\u003cbr data-start=\"4144\" data-end=\"4147\"\u003e• anyone who prefers formation over size\u003c\/p\u003e\n\u003cp data-start=\"4189\" data-end=\"4231\"\u003eYou will receive the exact specimen shown.\u003c\/p\u003e","brand":"Starshine Minerals","offers":[{"title":"Default Title","offer_id":56705385169240,"sku":null,"price":69.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0969\/4304\/7000\/files\/IMG_7409.jpg?v=1770893829"},{"product_id":"pyrite-cluster-with-uv-reactive-sphalerite-peru","title":"Pyrite Cluster with UV Reactive Sphalerite – Peru","description":"\u003cp data-start=\"159\" data-end=\"254\"\u003eWeight: 139 g\u003cbr data-start=\"172\" data-end=\"175\"\u003eSize: approx. 6 cm × 5.5 cm × 4 cm\u003cbr data-start=\"209\" data-end=\"212\"\u003eOrigin: Peru\u003cbr data-start=\"224\" data-end=\"227\"\u003eDisplay stand: not included\u003c\/p\u003e\n\u003chr data-start=\"256\" data-end=\"261\"\u003e\n\u003ch2 data-start=\"263\" data-end=\"285\"\u003eAbout This Specimen\u003c\/h2\u003e\n\u003cp data-start=\"287\" data-end=\"610\"\u003eThis is a sculptural multi-generation pyrite crystal cluster displaying sharp metallic cubic faces partially coated in a fine granular sulfide layer. Under UV light the specimen produces vivid orange-red fluorescence across the darker matrix areas, creating a dramatic contrast against the reflective gold crystal surfaces.\u003c\/p\u003e\n\u003cp data-start=\"612\" data-end=\"1007\"\u003eThe piece formed in at least two distinct mineralisation stages. First, well-defined pyrite crystals grew freely within an open hydrothermal cavity, producing the geometric cubic habit typical of slow, stable growth conditions. Later, a second phase deposited micro-crystalline sulfides over parts of the earlier crystal faces, leaving sections exposed while others became textured and darkened.\u003c\/p\u003e\n\u003cp data-start=\"1009\" data-end=\"1214\"\u003eBecause of this, the specimen shows both reflective mirror-like faces and granular mineral growth in a single piece — effectively recording different chemical environments within the same cavity over time.\u003c\/p\u003e\n\u003cp data-start=\"1216\" data-end=\"1309\"\u003eIn daylight it appears architectural and metallic.\u003cbr data-start=\"1266\" data-end=\"1269\"\u003eUnder UV it becomes active and luminous.\u003c\/p\u003e\n\u003chr data-start=\"1311\" data-end=\"1316\"\u003e\n\u003ch2 data-start=\"1318\" data-end=\"1341\"\u003eGeological Formation\u003c\/h2\u003e\n\u003cp data-start=\"1343\" data-end=\"1494\"\u003ePyrite forms in hydrothermal veins when iron-rich fluids circulate through fractures in host rock and crystallise as temperatures and pressures change.\u003c\/p\u003e\n\u003cp data-start=\"1496\" data-end=\"1528\"\u003eFormation sequence visible here:\u003c\/p\u003e\n\u003col data-start=\"1530\" data-end=\"1808\"\u003e\n\u003cli data-start=\"1530\" data-end=\"1589\"\u003e\n\u003cp data-start=\"1533\" data-end=\"1589\"\u003eOpen cavity allowed free-growing cubic pyrite crystals\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1590\" data-end=\"1639\"\u003e\n\u003cp data-start=\"1593\" data-end=\"1639\"\u003eChemical conditions shifted within the fluid\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1640\" data-end=\"1738\"\u003e\n\u003cp data-start=\"1643\" data-end=\"1738\"\u003eSecondary sulfide minerals (including sphalerite-type coatings) deposited over earlier growth\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1739\" data-end=\"1808\"\u003e\n\u003cp data-start=\"1742\" data-end=\"1808\"\u003eHydrocarbon residues became trapped within the later mineral layer\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp data-start=\"1810\" data-end=\"1960\"\u003eThese trapped organic compounds are responsible for the UV fluorescence — not the pyrite itself, but materials introduced during later mineralisation.\u003c\/p\u003e\n\u003cp data-start=\"1962\" data-end=\"2054\"\u003eThis makes the specimen a record of changing geochemistry rather than a single growth event.\u003c\/p\u003e\n\u003chr data-start=\"2056\" data-end=\"2061\"\u003e\n\u003ch2 data-start=\"2063\" data-end=\"2092\"\u003eApproximate Geological Age\u003c\/h2\u003e\n\u003cp data-start=\"2094\" data-end=\"2190\"\u003eThese hydrothermal sulfide deposits formed during Andean mountain building in the Miocene epoch.\u003c\/p\u003e\n\u003cp data-start=\"2192\" data-end=\"2248\"\u003eEstimated age: \u003cstrong data-start=\"2207\" data-end=\"2248\"\u003eapproximately 10–20 million years old\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"2250\" data-end=\"2387\"\u003eThis is significantly younger than many quartz geode systems, forming during active tectonic uplift rather than ancient volcanic cooling.\u003c\/p\u003e\n\u003chr data-start=\"2389\" data-end=\"2394\"\u003e\n\u003ch2 data-start=\"2396\" data-end=\"2416\"\u003eUV \u0026amp; Visual Notes\u003c\/h2\u003e\n\u003cp data-start=\"2418\" data-end=\"2676\"\u003e• Bright orange-red fluorescence under longwave UV\u003cbr data-start=\"2468\" data-end=\"2471\"\u003e• Metallic reflective pyrite faces remain non-fluorescent\u003cbr data-start=\"2528\" data-end=\"2531\"\u003e• Strong contrast between crystal faces and matrix\u003cbr data-start=\"2581\" data-end=\"2584\"\u003e• Visible multi-stage mineral growth\u003cbr data-start=\"2620\" data-end=\"2623\"\u003e• Different appearance in daylight vs UV environments\u003c\/p\u003e\n\u003chr data-start=\"2678\" data-end=\"2683\"\u003e\n\u003ch2 data-start=\"2685\" data-end=\"2711\"\u003eRarity \u0026amp; Collectability\u003c\/h2\u003e\n\u003cp data-start=\"2713\" data-end=\"2788\"\u003ePyrite itself is common — sculptural hydrothermal growth sequences are not.\u003c\/p\u003e\n\u003cp data-start=\"2790\" data-end=\"2818\"\u003eWhat elevates this specimen:\u003c\/p\u003e\n\u003cp data-start=\"2820\" data-end=\"3016\"\u003e• Multi-generation crystal formation\u003cbr data-start=\"2856\" data-end=\"2859\"\u003e• Secondary mineral overgrowth preserved\u003cbr data-start=\"2899\" data-end=\"2902\"\u003e• UV reactive hydrocarbon inclusions\u003cbr data-start=\"2938\" data-end=\"2941\"\u003e• Balanced cabinet display form\u003cbr data-start=\"2972\" data-end=\"2975\"\u003e• Peruvian hydrothermal locality material\u003c\/p\u003e\n\u003cp data-start=\"3018\" data-end=\"3131\"\u003eCollector category: Cabinet mineral specimen\u003cbr data-start=\"3062\" data-end=\"3065\"\u003eRarity rating: ★★★☆☆ (Formation interest rather than rare species)\u003c\/p\u003e\n\u003cp data-start=\"3133\" data-end=\"3247\"\u003eThis type of piece appeals to collectors who value formation history and optical behaviour rather than size alone.\u003c\/p\u003e\n\u003chr data-start=\"3249\" data-end=\"3254\"\u003e\n\u003ch2 data-start=\"3256\" data-end=\"3268\"\u003eCondition\u003c\/h2\u003e\n\u003cp data-start=\"3270\" data-end=\"3400\"\u003e• Natural unpolished specimen\u003cbr data-start=\"3299\" data-end=\"3302\"\u003e• Minor contacts typical of extraction\u003cbr data-start=\"3340\" data-end=\"3343\"\u003e• No repairs or enhancements\u003cbr data-start=\"3371\" data-end=\"3374\"\u003e• Stable and display ready\u003c\/p\u003e\n\u003cp data-start=\"3402\" data-end=\"3475\"\u003ePlease review photographs carefully as they form part of the description.\u003c\/p\u003e\n\u003chr data-start=\"3477\" data-end=\"3482\"\u003e\n\u003ch2 data-start=\"3484\" data-end=\"3512\"\u003eWhy This Piece Is Special\u003c\/h2\u003e\n\u003cp data-start=\"3514\" data-end=\"3558\"\u003eMany pyrite specimens are purely reflective.\u003c\/p\u003e\n\u003cp data-start=\"3560\" data-end=\"3584\"\u003eThis one is interactive.\u003c\/p\u003e\n\u003cp data-start=\"3586\" data-end=\"3875\"\u003eIt preserves a chemical transition inside a mineral vein — from clean metallic crystal growth to later mineral coating — and UV light reveals the final stage of that process. The specimen changes character depending on how it is viewed, making it both geological record and visual display.\u003c\/p\u003e\n\u003cp data-start=\"3877\" data-end=\"3919\"\u003eYou will receive the exact specimen shown.\u003c\/p\u003e","brand":"Starshine Minerals","offers":[{"title":"Default Title","offer_id":56705596391768,"sku":null,"price":86.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0969\/4304\/7000\/files\/IMG_7353.jpg?v=1770896614"},{"product_id":"frosted-amethyst-geode-sculptural-volcanic-formation-brazil","title":"Frosted Amethyst Geode | Sculptural Volcanic Formation | Brazil","description":"\u003cp data-start=\"556\" data-end=\"590\"\u003eLikely Rio Grande do Sul, Brazil\u003c\/p\u003e\n\u003cp data-start=\"592\" data-end=\"750\"\u003e\u003cstrong data-start=\"592\" data-end=\"603\"\u003eWeight:\u003c\/strong\u003e 1.224 kg\u003cbr data-start=\"612\" data-end=\"615\"\u003e\u003cstrong data-start=\"615\" data-end=\"624\"\u003eSize:\u003c\/strong\u003e approx. 12 × 13 × 7–8 cm\u003cbr data-start=\"649\" data-end=\"652\"\u003e\u003cstrong data-start=\"652\" data-end=\"667\"\u003eBase width:\u003c\/strong\u003e approx. 8 cm\u003cbr data-start=\"680\" data-end=\"683\"\u003e\u003cstrong data-start=\"683\" data-end=\"702\"\u003eStand included:\u003c\/strong\u003e No\u003cbr data-start=\"705\" data-end=\"708\"\u003e\u003cstrong data-start=\"708\" data-end=\"724\"\u003eUV response:\u003c\/strong\u003e No notable fluorescence\u003c\/p\u003e\n\u003cp data-start=\"757\" data-end=\"783\"\u003e\u003cstrong data-start=\"760\" data-end=\"783\"\u003eAbout this specimen\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"785\" data-end=\"937\"\u003eThis is a substantial, naturally bowl-shaped amethyst geode with densely packed quartz crystal growth and a distinctive matte “frosted” surface texture.\u003c\/p\u003e\n\u003cp data-start=\"939\" data-end=\"1247\"\u003eIn daylight, the piece displays soft lilac outer crystals transitioning into deeper violet tones toward the centre of the cavity. The crystal faces are coated in a fine micro-druzy overgrowth, creating a velvety, sugared appearance rather than the high-gloss finish often seen in commercial cathedral pieces.\u003c\/p\u003e\n\u003cp data-start=\"1249\" data-end=\"1472\"\u003eThe thick agate rind and rounded cavity form are consistent with basalt-hosted volcanic geodes. The bowl-like structure gives the specimen depth and strong natural symmetry, making it visually striking from multiple angles.\u003c\/p\u003e\n\u003cp data-start=\"1474\" data-end=\"1573\"\u003eMinor edge chips are present from extraction — these are natural mining marks and not later damage.\u003c\/p\u003e\n\u003chr data-start=\"1575\" data-end=\"1578\"\u003e\n\u003cp data-start=\"1580\" data-end=\"1607\"\u003e \u003cstrong data-start=\"1583\" data-end=\"1607\"\u003eGeological formation\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"1609\" data-end=\"1681\"\u003eThis geode formed within a gas cavity inside a cooling basalt lava flow.\u003c\/p\u003e\n\u003cp data-start=\"1683\" data-end=\"1893\"\u003eAs the volcanic rock solidified, hollow pockets were left behind. Over time, silica-rich hydrothermal fluids moved through fractures in the basalt, depositing successive layers of quartz along the cavity walls.\u003c\/p\u003e\n\u003cp data-start=\"1895\" data-end=\"2102\"\u003eTrace amounts of iron became incorporated into the quartz lattice during crystallisation. Natural irradiation later altered the iron’s oxidation state, producing the purple colour characteristic of amethyst.\u003c\/p\u003e\n\u003cp data-start=\"2104\" data-end=\"2336\"\u003eThe frosted texture seen on this specimen likely developed during a later stage of mineral growth, when subtle shifts in fluid chemistry caused micro-crystalline quartz to overgrow the existing crystal faces, softening their lustre.\u003c\/p\u003e\n\u003chr data-start=\"2338\" data-end=\"2341\"\u003e\n\u003cp data-start=\"2343\" data-end=\"2375\"\u003e\u003cstrong data-start=\"2345\" data-end=\"2375\"\u003eApproximate geological age\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"2377\" data-end=\"2473\"\u003eAmethyst geodes from southern Brazil are typically associated with the Paraná volcanic province.\u003c\/p\u003e\n\u003cp data-start=\"2475\" data-end=\"2516\"\u003eThese basalt flows date to approximately:\u003c\/p\u003e\n\u003cp data-start=\"2518\" data-end=\"2575\"\u003e\u003cstrong data-start=\"2518\" data-end=\"2547\"\u003e130–135 million years old\u003c\/strong\u003e\u003cbr data-start=\"2547\" data-end=\"2550\"\u003e(Early Cretaceous period)\u003c\/p\u003e\n\u003cp data-start=\"2577\" data-end=\"2668\"\u003eThis means the cavity that now holds these crystals formed during the age of the dinosaurs.\u003c\/p\u003e\n\u003chr data-start=\"2670\" data-end=\"2673\"\u003e\n\u003cp data-start=\"2675\" data-end=\"2704\"\u003e \u003cstrong data-start=\"2677\" data-end=\"2704\"\u003eRarity \u0026amp; collectability\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"2706\" data-end=\"2753\"\u003eWhile amethyst itself is not rare, pieces with:\u003c\/p\u003e\n\u003cul data-start=\"2755\" data-end=\"2972\"\u003e\n\u003cli data-start=\"2755\" data-end=\"2795\"\u003e\n\u003cp data-start=\"2757\" data-end=\"2795\"\u003eNatural bowl-shaped cavity formation\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2796\" data-end=\"2823\"\u003e\n\u003cp data-start=\"2798\" data-end=\"2823\"\u003eThick intact agate rind\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2824\" data-end=\"2858\"\u003e\n\u003cp data-start=\"2826\" data-end=\"2858\"\u003eEven internal crystal coverage\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2859\" data-end=\"2898\"\u003e\n\u003cp data-start=\"2861\" data-end=\"2898\"\u003eDistinct matte “frosted” overgrowth\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2899\" data-end=\"2935\"\u003e\n\u003cp data-start=\"2901\" data-end=\"2935\"\u003eStrong central violet saturation\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2936\" data-end=\"2972\"\u003e\n\u003cp data-start=\"2938\" data-end=\"2972\"\u003eSubstantial weight (over 1.2 kg)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2974\" data-end=\"3035\"\u003eare less commonly seen than standard polished cathedral cuts.\u003c\/p\u003e\n\u003cp data-start=\"3037\" data-end=\"3211\"\u003eThe frosted surface gives this specimen a more geological, unrefined character — preserving the natural growth history rather than presenting a polished commercial aesthetic.\u003c\/p\u003e\n\u003cp data-start=\"3213\" data-end=\"3260\"\u003eThis is a strong display specimen suitable for:\u003c\/p\u003e\n\u003cul data-start=\"3262\" data-end=\"3357\"\u003e\n\u003cli data-start=\"3262\" data-end=\"3286\"\u003e\n\u003cp data-start=\"3264\" data-end=\"3286\"\u003eA cabinet collection\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3287\" data-end=\"3314\"\u003e\n\u003cp data-start=\"3289\" data-end=\"3314\"\u003eA statement shelf piece\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3315\" data-end=\"3357\"\u003e\n\u003cp data-start=\"3317\" data-end=\"3357\"\u003eA natural-formation focused collection\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"3359\" data-end=\"3362\"\u003e\n\u003cp data-start=\"3364\" data-end=\"3386\"\u003e\u003cstrong data-start=\"3367\" data-end=\"3386\"\u003eCare \u0026amp; handling\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"3388\" data-end=\"3543\"\u003eHandle with care — natural crystal points are delicate\u003cbr data-start=\"3442\" data-end=\"3445\"\u003eAvoid prolonged moisture exposure\u003cbr data-start=\"3478\" data-end=\"3481\"\u003eDisplay away from strong, direct sunlight to preserve colour\u003c\/p\u003e","brand":"Starshine Minerals","offers":[{"title":"Default Title","offer_id":56746890002776,"sku":null,"price":295.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0969\/4304\/7000\/files\/IMG_8369.jpg?v=1771444613"},{"product_id":"quartz-with-specular-hematite-sculptural-hydrothermal-cluster-inner-mongolia-china","title":"Quartz with Specular Hematite | Sculptural Hydrothermal Cluster | Inner Mongolia, China","description":"\u003ch1 data-start=\"276\" data-end=\"309\"\u003eQuartz with Specular Hematite\u003c\/h1\u003e\n\u003cp data-start=\"310\" data-end=\"333\"\u003eInner Mongolia, China\u003c\/p\u003e\n\u003chr data-start=\"335\" data-end=\"338\"\u003e\n\u003ch2 data-start=\"340\" data-end=\"361\"\u003eAbout the Specimen\u003c\/h2\u003e\n\u003cp data-start=\"363\" data-end=\"543\"\u003eThis sculptural quartz cluster from Inner Mongolia features upright prismatic crystal growth rising from a solid pale matrix, accented by metallic black specular hematite rosettes.\u003c\/p\u003e\n\u003cp data-start=\"545\" data-end=\"790\"\u003eThe quartz crystals are well-formed, with defined hexagonal prism faces and sharp terminations. Clarity ranges from transparent tips to softly milky bodies, with natural surface texturing and subtle internal inclusions visible in several points.\u003c\/p\u003e\n\u003cp data-start=\"792\" data-end=\"1071\"\u003eAcross the matrix and between crystal bases, bladed aggregates of specular hematite create strong visual contrast. These metallic iron oxide formations developed during a later mineralisation phase, interrupting the earlier quartz growth and adding structural depth to the piece.\u003c\/p\u003e\n\u003cp data-start=\"1073\" data-end=\"1200\"\u003eMost crystal points remain intact, which gives this specimen a particularly clean vertical profile and strong display presence.\u003c\/p\u003e\n\u003cp data-start=\"1202\" data-end=\"1331\"\u003eEven the reverse side displays fine micro-crystalline sparkle and natural surface texture, allowing for multi-angle appreciation.\u003c\/p\u003e\n\u003cp data-start=\"1333\" data-end=\"1354\"\u003eTotal weight: 239 g\u003c\/p\u003e\n\u003cp data-start=\"1356\" data-end=\"1398\"\u003eFormat: Natural quartz cluster on matrix\u003c\/p\u003e\n\u003cp data-start=\"1400\" data-end=\"1443\"\u003eCondition: Natural, unpolished, untreated\u003c\/p\u003e\n\u003cp data-start=\"1445\" data-end=\"1478\"\u003eLocality: Inner Mongolia, China\u003c\/p\u003e\n\u003cp data-start=\"1480\" data-end=\"1516\"\u003eThis is the exact specimen pictured.\u003c\/p\u003e\n\u003chr data-start=\"1518\" data-end=\"1521\"\u003e\n\u003ch2 data-start=\"1523\" data-end=\"1552\"\u003eMeasurements (Approximate)\u003c\/h2\u003e\n\u003cp data-start=\"1554\" data-end=\"1568\"\u003eLength: 8 cm\u003c\/p\u003e\n\u003cp data-start=\"1570\" data-end=\"1589\"\u003eWidth: 6 – 6.5 cm\u003c\/p\u003e\n\u003cp data-start=\"1591\" data-end=\"1638\"\u003eHeight: Approximately 6 cm (to highest point)\u003c\/p\u003e\n\u003cp data-start=\"1640\" data-end=\"1688\"\u003eBase dimensions: Approximately 5.5 cm × 7.5 cm\u003c\/p\u003e\n\u003cp data-start=\"1690\" data-end=\"1770\"\u003eMeasurements are approximate due to the natural, irregular form of the specimen.\u003c\/p\u003e\n\u003chr data-start=\"1772\" data-end=\"1775\"\u003e\n\u003ch2 data-start=\"1777\" data-end=\"1793\"\u003eUV Reactivity\u003c\/h2\u003e\n\u003cp data-start=\"1795\" data-end=\"1859\"\u003eNo fluorescence observed under 365nm longwave ultraviolet light.\u003c\/p\u003e\n\u003cp data-start=\"1861\" data-end=\"1935\"\u003eAll photographs represent the specimen under standard lighting conditions.\u003c\/p\u003e\n\u003chr data-start=\"1937\" data-end=\"1940\"\u003e\n\u003ch2 data-start=\"1942\" data-end=\"1964\"\u003eMineral Composition\u003c\/h2\u003e\n\u003cp data-start=\"1966\" data-end=\"1998\"\u003ePrimary mineral: Quartz (SiO₂)\u003c\/p\u003e\n\u003cp data-start=\"2000\" data-end=\"2055\"\u003eSecondary mineral: Hematite (Fe₂O₃), specular variety\u003c\/p\u003e\n\u003cp data-start=\"2057\" data-end=\"2248\"\u003eSpecular hematite is a crystalline, metallic form of hematite characterised by reflective, platy or bladed aggregates. The term describes crystal habit rather than a separate mineral species.\u003c\/p\u003e\n\u003chr data-start=\"2250\" data-end=\"2253\"\u003e\n\u003ch2 data-start=\"2255\" data-end=\"2278\"\u003eGeological Formation\u003c\/h2\u003e\n\u003cp data-start=\"2280\" data-end=\"2430\"\u003eQuartz forms when silica-rich hydrothermal fluids circulate through fractures in host rock, gradually precipitating into prismatic crystal structures.\u003c\/p\u003e\n\u003cp data-start=\"2432\" data-end=\"2449\"\u003eIn this specimen:\u003c\/p\u003e\n\u003cp data-start=\"2451\" data-end=\"2716\"\u003e• Quartz formed first, establishing the primary crystal framework\u003cbr data-start=\"2516\" data-end=\"2519\"\u003e• Later iron-rich fluids introduced hematite\u003cbr data-start=\"2563\" data-end=\"2566\"\u003e• Hematite crystallised along exposed surfaces and between quartz growth zones\u003cbr data-start=\"2644\" data-end=\"2647\"\u003e• Multiple mineralisation stages are preserved within one structure\u003c\/p\u003e\n\u003cp data-start=\"2718\" data-end=\"2824\"\u003eThe result is a layered hydrothermal formation that records changing fluid chemistry over geological time.\u003c\/p\u003e\n\u003chr data-start=\"2826\" data-end=\"2829\"\u003e\n\u003ch2 data-start=\"2831\" data-end=\"2860\"\u003eApproximate Geological Age\u003c\/h2\u003e\n\u003cp data-start=\"2862\" data-end=\"2964\"\u003eHydrothermal quartz systems in Inner Mongolia are commonly associated with Mesozoic tectonic activity.\u003c\/p\u003e\n\u003cp data-start=\"2966\" data-end=\"3020\"\u003eA reasonable geological estimate for this specimen is:\u003c\/p\u003e\n\u003cp data-start=\"3022\" data-end=\"3062\"\u003eApproximately 50–150 million years old\u003c\/p\u003e\n\u003chr data-start=\"3064\" data-end=\"3067\"\u003e\n\u003ch2 data-start=\"3069\" data-end=\"3095\"\u003eRarity \u0026amp; Collectability\u003c\/h2\u003e\n\u003cp data-start=\"3097\" data-end=\"3149\"\u003eQuartz itself is widespread; however, clusters with:\u003c\/p\u003e\n\u003cp data-start=\"3151\" data-end=\"3339\"\u003e• Strong vertical crystal development\u003cbr data-start=\"3188\" data-end=\"3191\"\u003e• Intact, well-defined terminations\u003cbr data-start=\"3226\" data-end=\"3229\"\u003e• Clear contrast between quartz and specular hematite\u003cbr data-start=\"3282\" data-end=\"3285\"\u003e• Stable matrix support\u003cbr data-start=\"3308\" data-end=\"3311\"\u003e• Clean structural balance\u003c\/p\u003e\n\u003cp data-start=\"3341\" data-end=\"3377\"\u003eare more desirable among collectors.\u003c\/p\u003e\n\u003cp data-start=\"3379\" data-end=\"3518\"\u003eThe preserved crystal integrity and defined iron mineralisation make this a solid mid-sized cabinet specimen with strong display character.\u003c\/p\u003e\n\u003cp data-start=\"3520\" data-end=\"3554\"\u003eEach formation is entirely unique.\u003c\/p\u003e\n\u003chr data-start=\"3556\" data-end=\"3559\"\u003e\n\u003ch2 data-start=\"3561\" data-end=\"3579\"\u003eCare \u0026amp; Handling\u003c\/h2\u003e\n\u003cp data-start=\"3581\" data-end=\"3640\"\u003eHandle with care — natural crystal points may be delicate\u003c\/p\u003e\n\u003cp data-start=\"3642\" data-end=\"3684\"\u003eAvoid impact or pressure on terminations\u003c\/p\u003e\n\u003cp data-start=\"3686\" data-end=\"3728\"\u003eClean gently with a soft, dry brush only\u003c\/p\u003e\n\u003cp data-start=\"3730\" data-end=\"3795\"\u003eWill be carefully packed to protect crystal tips during transit\u003c\/p\u003e","brand":"Starshine Minerals","offers":[{"title":"Default Title","offer_id":56785717297496,"sku":null,"price":118.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0969\/4304\/7000\/files\/IMG_9042.jpg?v=1771878828"},{"product_id":"blue-barite-with-fluorescent-calcite-quartz-erongo-mountains-namibia","title":"Blue Barite with Fluorescent Calcite \u0026 Quartz | Erongo Mountains, Namibia","description":"\u003cp data-start=\"548\" data-end=\"779\"\u003eWeight: \u003cstrong data-start=\"556\" data-end=\"565\"\u003e706 g\u003c\/strong\u003e\u003cbr data-start=\"565\" data-end=\"568\"\u003eSize: approx. \u003cstrong data-start=\"582\" data-end=\"600\"\u003e12.5 × 12.5 cm\u003c\/strong\u003e (irregular plate)\u003cbr data-start=\"618\" data-end=\"621\"\u003eDepth: approx. \u003cstrong data-start=\"636\" data-end=\"648\"\u003e5–6.5 cm\u003c\/strong\u003e in areas\u003cbr data-start=\"657\" data-end=\"660\"\u003eStand included: \u003cstrong data-start=\"676\" data-end=\"708\"\u003eYes (display stand included)\u003c\/strong\u003e\u003cbr data-start=\"708\" data-end=\"711\"\u003eUV response: \u003cstrong data-start=\"724\" data-end=\"779\"\u003eCalcite fluoresces deep crimson-red under 365 nm UV\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr data-start=\"781\" data-end=\"784\"\u003e\n\u003ch2 data-start=\"786\" data-end=\"808\"\u003eAbout this specimen\u003c\/h2\u003e\n\u003cp data-start=\"810\" data-end=\"960\"\u003eThis sculptural mineral specimen features pale sky-blue barite crystals emerging from a textured matrix of quartz druse and manganese-bearing calcite.\u003c\/p\u003e\n\u003cp data-start=\"962\" data-end=\"1218\"\u003eThe barite forms elongated bladed crystals arranged in radiating clusters across the surface of the piece. Their soft blue colour and frosted translucency create a delicate contrast against the pale cream calcite and sparkling quartz microcrystals beneath.\u003c\/p\u003e\n\u003cp data-start=\"1220\" data-end=\"1445\"\u003eAcross several cavities, dense quartz druse forms a glittering crystalline landscape of sharply terminated micro-points. These fine crystals reflect light from multiple angles, giving the specimen depth and visual complexity.\u003c\/p\u003e\n\u003cp data-start=\"1447\" data-end=\"1590\"\u003eUnder ultraviolet light, the calcite zones display a \u003cstrong data-start=\"1500\" data-end=\"1533\"\u003edeep crimson-red fluorescence\u003c\/strong\u003e, caused by manganese incorporated during crystal growth.\u003c\/p\u003e\n\u003cp data-start=\"1592\" data-end=\"1861\"\u003eThis fluorescence is \u003cstrong data-start=\"1613\" data-end=\"1679\"\u003econsiderably stronger in person than cameras typically capture\u003c\/strong\u003e, and photographing the red response accurately under UV light can be extremely difficult. The colour is much richer to the eye when viewed in a dark environment with a 365 nm torch.\u003c\/p\u003e\n\u003cp data-start=\"1863\" data-end=\"2027\"\u003eThe specimen has a naturally irregular plate formation with exposed crystal pockets and layered mineral growth that can be appreciated from multiple viewing angles.\u003c\/p\u003e\n\u003cp data-start=\"2029\" data-end=\"2069\"\u003e\u003cstrong data-start=\"2029\" data-end=\"2069\"\u003eThis is the exact specimen pictured.\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr data-start=\"2071\" data-end=\"2074\"\u003e\n\u003ch2 data-start=\"2076\" data-end=\"2099\"\u003eGeological formation\u003c\/h2\u003e\n\u003cp data-start=\"2101\" data-end=\"2217\"\u003eThis specimen formed within hydrothermal fractures inside ancient volcanic rocks of the Erongo Mountains in Namibia.\u003c\/p\u003e\n\u003cp data-start=\"2219\" data-end=\"2407\"\u003eAfter the host rock fractured, mineral-rich hydrothermal fluids circulated through the cavity system. As temperature and chemistry fluctuated, different minerals crystallised sequentially.\u003c\/p\u003e\n\u003cp data-start=\"2409\" data-end=\"2625\"\u003eEarly stages deposited calcite and fine quartz crystals along the cavity walls. Later, barium-rich fluids allowed barite to crystallise in distinctive bladed forms that grew outward across the earlier mineral layers.\u003c\/p\u003e\n\u003cp data-start=\"2627\" data-end=\"2774\"\u003eTrace manganese incorporated into the calcite during crystallisation is responsible for the deep red fluorescence observed under ultraviolet light.\u003c\/p\u003e\n\u003cp data-start=\"2776\" data-end=\"2872\"\u003eThe resulting specimen preserves several stages of mineral growth within a single cavity system.\u003c\/p\u003e\n\u003chr data-start=\"2874\" data-end=\"2877\"\u003e\n\u003ch2 data-start=\"2879\" data-end=\"2908\"\u003eApproximate geological age\u003c\/h2\u003e\n\u003cp data-start=\"2910\" data-end=\"3049\"\u003eThe volcanic complexes of the Erongo Mountains formed during a period of intense magmatic activity associated with the breakup of Gondwana.\u003c\/p\u003e\n\u003cp data-start=\"3051\" data-end=\"3100\"\u003eThese rocks are generally dated to approximately:\u003c\/p\u003e\n\u003cp data-start=\"3102\" data-end=\"3159\"\u003e\u003cstrong data-start=\"3102\" data-end=\"3131\"\u003e120–150 million years old\u003c\/strong\u003e\u003cbr data-start=\"3131\" data-end=\"3134\"\u003e(Early Cretaceous period)\u003c\/p\u003e\n\u003cp data-start=\"3161\" data-end=\"3267\"\u003eMeaning the hydrothermal system responsible for these crystals was active during the age of the dinosaurs.\u003c\/p\u003e\n\u003chr data-start=\"3269\" data-end=\"3272\"\u003e\n\u003ch2 data-start=\"3274\" data-end=\"3300\"\u003eRarity \u0026amp; collectability\u003c\/h2\u003e\n\u003cp data-start=\"3302\" data-end=\"3464\"\u003eThe Erongo Mountains are one of the world’s most famous mineral localities, producing aesthetically striking combinations of barite, quartz, fluorite and calcite.\u003c\/p\u003e\n\u003cp data-start=\"3521\" data-end=\"3699\"\u003eSky-blue barite crystal colour\u003cbr data-start=\"3551\" data-end=\"3554\"\u003eWell-formed bladed crystal habit\u003cbr data-start=\"3586\" data-end=\"3589\"\u003eContrasting quartz druse pockets\u003cbr data-start=\"3621\" data-end=\"3624\"\u003eUV-reactive manganese-bearing calcite\u003cbr data-start=\"3661\" data-end=\"3664\"\u003eBalanced sculptural plate formation\u003c\/p\u003e\n\u003cp data-start=\"3701\" data-end=\"3876\"\u003eThe combination of delicate barite crystals, sparkling quartz druse and strong ultraviolet fluorescence makes this both a \u003cstrong data-start=\"3823\" data-end=\"3875\"\u003edisplay specimen and a fluorescent mineral piece\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp data-start=\"3878\" data-end=\"3891\"\u003eSuitable for:\u003c\/p\u003e\n\u003cp data-start=\"3893\" data-end=\"3984\"\u003eA cabinet mineral collection\u003cbr data-start=\"3921\" data-end=\"3924\"\u003eA fluorescent mineral display\u003cbr data-start=\"3953\" data-end=\"3956\"\u003eA geology-focused collection\u003c\/p\u003e\n\u003chr data-start=\"3986\" data-end=\"3989\"\u003e\n\u003ch2 data-start=\"3991\" data-end=\"4009\"\u003eCare \u0026amp; handling\u003c\/h2\u003e\n\u003cp data-start=\"4011\" data-end=\"4256\"\u003eHandle with care — barite crystals are relatively soft and delicate\u003cbr data-start=\"4078\" data-end=\"4081\"\u003eAvoid prolonged moisture exposure\u003cbr data-start=\"4114\" data-end=\"4117\"\u003eDisplay away from strong vibration or handling of crystal points\u003cbr data-start=\"4181\" data-end=\"4184\"\u003eFor UV viewing, use a \u003cstrong data-start=\"4206\" data-end=\"4256\"\u003e365 nm ultraviolet torch in a dark environment\u003c\/strong\u003e\u003c\/p\u003e","brand":"Starshine Minerals","offers":[{"title":"Default Title","offer_id":56861039919448,"sku":null,"price":225.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0969\/4304\/7000\/files\/IMG_0233.jpg?v=1773004420"},{"product_id":"live-sales","title":"Live sales","description":"\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e£1 LIVE CLAIM PAYMENT ONLY\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis listing is NOT for a crystal.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIt is used to pay for items you have claimed during a live sale.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e👉 Please enter the total value of your claims as the quantity\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e(e.g. £54 = quantity 54)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e❗ Orders for “1” will not receive a crystal and will be cancelled.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThank you so much for supporting Starshine Minerals 💛\u003c\/span\u003e\u003c\/p\u003e","brand":"Starshine Minerals","offers":[{"title":"Default Title","offer_id":56916115784024,"sku":null,"price":1.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0969\/4304\/7000\/files\/IMG_4400.jpg?v=1777201225"},{"product_id":"quartz-with-epidote-cluster-cabinet-specimen-guizhou-china","title":"Quartz with Epidote Cluster | Cabinet Specimen | Guizhou, China","description":"\u003ch3 data-section-id=\"1pnype7\" data-start=\"263\" data-end=\"284\"\u003eSpecimen Overview\u003c\/h3\u003e\n\u003cp data-start=\"286\" data-end=\"652\"\u003e\u003cstrong data-start=\"286\" data-end=\"298\"\u003eMineral:\u003c\/strong\u003e Quartz with Epidote\u003cbr data-start=\"318\" data-end=\"321\"\u003e\u003cstrong data-start=\"321\" data-end=\"332\"\u003eWeight:\u003c\/strong\u003e 413 g\u003cbr data-start=\"338\" data-end=\"341\"\u003e\u003cstrong data-start=\"341\" data-end=\"356\"\u003eDimensions:\u003c\/strong\u003e Approx. 12 cm × 10 cm × 6 cm\u003cbr data-start=\"385\" data-end=\"388\"\u003e\u003cstrong data-start=\"388\" data-end=\"397\"\u003eForm:\u003c\/strong\u003e Natural cluster on matrix\u003cbr data-start=\"423\" data-end=\"426\"\u003e\u003cstrong data-start=\"426\" data-end=\"439\"\u003eLocality:\u003c\/strong\u003e Guizhou Province, China\u003cbr data-start=\"463\" data-end=\"466\"\u003e\u003cstrong data-start=\"466\" data-end=\"482\"\u003eUV Reaction:\u003c\/strong\u003e No notable fluorescence under 365 nm\u003cbr data-start=\"519\" data-end=\"522\"\u003e\u003cstrong data-start=\"522\" data-end=\"541\"\u003eStand Included:\u003c\/strong\u003e Yes\u003cbr data-start=\"545\" data-end=\"548\"\u003e\u003cstrong data-start=\"548\" data-end=\"562\"\u003eCondition:\u003c\/strong\u003e Good overall; minor natural edge wear\/chipping present consistent with clustered growth\u003c\/p\u003e\n\u003cp data-start=\"654\" data-end=\"690\"\u003eThis is the exact specimen pictured.\u003c\/p\u003e\n\u003chr data-start=\"692\" data-end=\"695\"\u003e\n\u003ch3 data-section-id=\"1dlfi13\" data-start=\"697\" data-end=\"720\"\u003eAbout This Specimen\u003c\/h3\u003e\n\u003cp data-start=\"722\" data-end=\"894\"\u003eA striking cabinet specimen from Guizhou featuring sharply formed translucent quartz crystals accented by rich green epidote growths both within and upon the crystal faces.\u003c\/p\u003e\n\u003cp data-start=\"896\" data-end=\"1189\"\u003eDark green radiating epidote sprays emerge across the specimen like miniature mineral forests, creating dramatic contrast against the icy clarity of the host quartz. Several terminations display phantom-like internal green zoning where mineral-rich fluids became trapped during crystal growth.\u003c\/p\u003e\n\u003cp data-start=\"1191\" data-end=\"1210\"\u003eThe combination of:\u003c\/p\u003e\n\u003cul data-start=\"1212\" data-end=\"1373\"\u003e\n\u003cli data-section-id=\"1enqhsa\" data-start=\"1212\" data-end=\"1250\"\u003eSharp multi-point quartz formation\u003c\/li\u003e\n\u003cli data-section-id=\"nfmpmp\" data-start=\"1251\" data-end=\"1280\"\u003eInternal green inclusions\u003c\/li\u003e\n\u003cli data-section-id=\"1pa05y9\" data-start=\"1281\" data-end=\"1307\"\u003eSurface epidote sprays\u003c\/li\u003e\n\u003cli data-section-id=\"wq41vt\" data-start=\"1308\" data-end=\"1334\"\u003eNatural matrix backing\u003c\/li\u003e\n\u003cli data-section-id=\"1k31yk0\" data-start=\"1335\" data-end=\"1373\"\u003eStrong three-dimensional structure\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1375\" data-end=\"1425\"\u003ecreates exceptional visual depth from every angle.\u003c\/p\u003e\n\u003cp data-start=\"1427\" data-end=\"1500\"\u003eThis is a highly aesthetic collector specimen with superb shelf presence.\u003c\/p\u003e\n\u003chr data-start=\"1502\" data-end=\"1505\"\u003e\n\u003ch3 data-section-id=\"1qtz3er\" data-start=\"1507\" data-end=\"1531\"\u003eGeological Formation\u003c\/h3\u003e\n\u003cp data-start=\"1533\" data-end=\"1638\"\u003eQuartz forms from silica-rich hydrothermal fluids moving through fractures and cavities within host rock.\u003c\/p\u003e\n\u003cp data-start=\"1640\" data-end=\"1805\"\u003eAs these crystals developed, epidote-bearing fluids entered the system, depositing green calcium-aluminium-iron silicate minerals onto and within the growing quartz.\u003c\/p\u003e\n\u003cp data-start=\"1807\" data-end=\"1873\"\u003eThis specimen records a multi-stage mineralisation event in which:\u003c\/p\u003e\n\u003cul data-start=\"1875\" data-end=\"2047\"\u003e\n\u003cli data-section-id=\"1mze53y\" data-start=\"1875\" data-end=\"1904\"\u003eQuartz crystallised first\u003c\/li\u003e\n\u003cli data-section-id=\"1vfq7xo\" data-start=\"1905\" data-end=\"1939\"\u003eHydrothermal chemistry shifted\u003c\/li\u003e\n\u003cli data-section-id=\"17tff7e\" data-start=\"1940\" data-end=\"1991\"\u003eEpidote precipitated during later growth phases\u003c\/li\u003e\n\u003cli data-section-id=\"6teo3j\" data-start=\"1992\" data-end=\"2047\"\u003eInclusions and overgrowths became preserved in situ\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2049\" data-end=\"2155\"\u003eThe result is a natural record of changing geological conditions captured within the crystal architecture.\u003c\/p\u003e\n\u003chr data-start=\"2157\" data-end=\"2160\"\u003e\n\u003ch3 data-section-id=\"qzj3ff\" data-start=\"2162\" data-end=\"2192\"\u003eApproximate Geological Age\u003c\/h3\u003e\n\u003cp data-start=\"2194\" data-end=\"2310\"\u003eMineralisation in the Guizhou hydrothermal systems responsible for material of this type is broadly associated with:\u003c\/p\u003e\n\u003cp data-start=\"2312\" data-end=\"2398\"\u003e\u003cstrong data-start=\"2312\" data-end=\"2364\"\u003eLate Mesozoic tectonic and hydrothermal activity\u003c\/strong\u003e\u003cbr data-start=\"2364\" data-end=\"2367\"\u003e\u003cstrong data-start=\"2367\" data-end=\"2398\"\u003e(~50–150 million years ago)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"2400\" data-end=\"2419\"\u003eDuring this period:\u003c\/p\u003e\n\u003cul data-start=\"2421\" data-end=\"2657\"\u003e\n\u003cli data-section-id=\"pl3ado\" data-start=\"2421\" data-end=\"2472\"\u003eDinosaurs still inhabited Earth (earlier range)\u003c\/li\u003e\n\u003cli data-section-id=\"1uzdn3f\" data-start=\"2473\" data-end=\"2523\"\u003eAsia was undergoing major tectonic deformation\u003c\/li\u003e\n\u003cli data-section-id=\"1slmr0b\" data-start=\"2524\" data-end=\"2592\"\u003eHydrothermal systems were actively depositing mineral-rich veins\u003c\/li\u003e\n\u003cli data-section-id=\"1n2rc21\" data-start=\"2593\" data-end=\"2657\"\u003eMountain-building and faulting shaped much of southern China\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2659\" data-end=\"2662\"\u003e\n\u003ch3 data-section-id=\"148reop\" data-start=\"2664\" data-end=\"2691\"\u003eRarity \u0026amp; Collectability\u003c\/h3\u003e\n\u003cp data-start=\"2693\" data-end=\"2839\"\u003eQuartz is common.\u003cbr data-start=\"2710\" data-end=\"2713\"\u003eWell-crystallised quartz with aesthetic epidote inclusion and overgrowth combinations of this quality is considerably less so.\u003c\/p\u003e\n\u003cp data-start=\"2841\" data-end=\"2871\"\u003eWhat distinguishes this piece:\u003c\/p\u003e\n\u003cul data-start=\"2873\" data-end=\"3101\"\u003e\n\u003cli data-section-id=\"j2y9kg\" data-start=\"2873\" data-end=\"2922\"\u003eExcellent contrast between quartz and epidote\u003c\/li\u003e\n\u003cli data-section-id=\"1xqgsaf\" data-start=\"2923\" data-end=\"2961\"\u003eMultiple sharply terminated points\u003c\/li\u003e\n\u003cli data-section-id=\"1a1e3gu\" data-start=\"2962\" data-end=\"3002\"\u003eInternal and external mineralisation\u003c\/li\u003e\n\u003cli data-section-id=\"o5kq8d\" data-start=\"3003\" data-end=\"3038\"\u003eAttractive balanced composition\u003c\/li\u003e\n\u003cli data-section-id=\"12dkz02\" data-start=\"3039\" data-end=\"3070\"\u003eStrong cabinet display size\u003c\/li\u003e\n\u003cli data-section-id=\"3tdf6l\" data-start=\"3071\" data-end=\"3101\"\u003eDesirable Chinese locality\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"3103\" data-end=\"3163\"\u003eA substantial and visually sophisticated collector specimen.\u003c\/p\u003e\n\u003chr data-start=\"3165\" data-end=\"3168\"\u003e\n\u003ch3 data-section-id=\"rn7fjq\" data-start=\"3170\" data-end=\"3189\"\u003eCondition Notes\u003c\/h3\u003e\n\u003cp data-start=\"3191\" data-end=\"3294\"\u003eMinor edge wear and small contact marks may be present, typical of natural clustered mineral specimens.\u003c\/p\u003e\n\u003cp data-start=\"3296\" data-end=\"3413\"\u003eThese are natural or collection-related imperfections and do not detract from the specimen’s overall display quality.\u003c\/p\u003e","brand":"Starshine Minerals","offers":[{"title":"Default Title","offer_id":57199867494744,"sku":null,"price":110.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0969\/4304\/7000\/files\/IMG_4961.jpg?v=1777389127"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0969\/4304\/7000\/collections\/IMG_6400.jpg?v=1770901638","url":"https:\/\/starshineminerals.co.uk\/collections\/natural-formations-1.oembed","provider":"Starshine Minerals","version":"1.0","type":"link"}