Purple Fluorite on Calcite with Chalcopyrite UV Reactive Collector Specimen | China (Hubei / Wuhan Region)

About the Specimen

This striking purple fluorite specimen features dense, intergrown cubic crystals set across a pale calcite-rich matrix, with additional natural chalcopyrite mineralisation 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.

Under longwave ultraviolet light, the fluorite exhibits a strong, vivid electric-blue fluorescence, 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.

This 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.

Total weight: 362 g
Format: Single natural fluorite cluster on matrix
Condition: Natural, unpolished, untreated
Locality: China (Hubei Province, Wuhan region)

Measurements (Approximate)

• Overall dimensions: approx. 12.5 cm × 9 cm

• Depth: approx. 2–3 cm

Measurements are approximate due to the natural, irregular form of the specimen.

UV Reactivity

This specimen displays a strong and highly saturated UV reaction, best observed under 365 nm longwave ultraviolet light.

Observed UV characteristics include:

• Intense electric-blue fluorescence across fluorite crystal faces

• Widespread and consistent response rather than isolated patches

• Subtle supporting fluorescence from the calcite-rich matrix

• Clear contrast between fluorescent crystals and darker host areas

No phosphorescence has been observed once the UV source is removed.

All UV photographs are taken under controlled conditions and accurately represent the specimen.

Geological Formation

Fluorite forms within hydrothermal vein systems, where mineral-rich fluids circulate through fractures in host rock and deposit crystals as temperature, pressure, and chemistry change over time.

In this specimen, successive stages of mineral growth have produced:

• Well-defined cubic fluorite crystals

• Layered and stepped crystal growth

• Calcite-rich host matrix

• Later-stage chalcopyrite mineralisation on the reverse

The combination of crystal habit, matrix association, and UV response reflects natural geological processes rather than treatment or enhancement.

Approximate Geological Age

While an exact formation age cannot be assigned to an individual specimen, fluorite deposits of this type typically form during major regional mineralisation events.

A reasonable geological estimate for this specimen is:

• Approximately 100–300 million years old

Rarity & Collectability

Fluorite is a well-known mineral; however, specimens combining strong cubic crystal form, deep purple colouration, intense UV fluorescence, and secondary chalcopyrite mineralisation are considerably less common.

Collectability features include:

• Dense, well-formed cubic fluorite crystals

• Strong longwave UV fluorescence

• Associated chalcopyrite on the reverse

• Display-ready natural form

• Clearly documented provenance and condition

This specimen sits comfortably within the collector-grade category and would suit both fluorite-focused and UV-reactive mineral collections.

Display & Mounting Note

This specimen is supplied with the gold-toned metal display stand shown in the photographs.

The 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.

Care & Handling

• Handle with care — fluorite has a relatively low hardness and may chip if knocked

• Avoid prolonged exposure to direct sunlight to preserve colour

• Clean gently using a soft, dry brush only

• Avoid water soaking or chemical cleaners

• UV display is safe, but prolonged intense exposure should be avoided for conservation

Price

£120.00
(Gold display stand included)