Quartz with Specular Hematite

Inner Mongolia, China

About the Specimen

This sculptural quartz cluster from Inner Mongolia features upright prismatic crystal growth rising from a solid pale matrix, accented by metallic black specular hematite rosettes.

The 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.

Across 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.

Most crystal points remain intact, which gives this specimen a particularly clean vertical profile and strong display presence.

Even the reverse side displays fine micro-crystalline sparkle and natural surface texture, allowing for multi-angle appreciation.

Total weight: 239 g

Format: Natural quartz cluster on matrix

Condition: Natural, unpolished, untreated

Locality: Inner Mongolia, China

This is the exact specimen pictured.

Measurements (Approximate)

Length: 8 cm

Width: 6 – 6.5 cm

Height: Approximately 6 cm (to highest point)

Base dimensions: Approximately 5.5 cm × 7.5 cm

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

UV Reactivity

No fluorescence observed under 365nm longwave ultraviolet light.

All photographs represent the specimen under standard lighting conditions.

Mineral Composition

Primary mineral: Quartz (SiO₂)

Secondary mineral: Hematite (Fe₂O₃), specular variety

Specular 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.

Geological Formation

Quartz forms when silica-rich hydrothermal fluids circulate through fractures in host rock, gradually precipitating into prismatic crystal structures.

In this specimen:

• Quartz formed first, establishing the primary crystal framework
• Later iron-rich fluids introduced hematite
• Hematite crystallised along exposed surfaces and between quartz growth zones
• Multiple mineralisation stages are preserved within one structure

The result is a layered hydrothermal formation that records changing fluid chemistry over geological time.

Approximate Geological Age

Hydrothermal quartz systems in Inner Mongolia are commonly associated with Mesozoic tectonic activity.

A reasonable geological estimate for this specimen is:

Approximately 50–150 million years old

Rarity & Collectability

Quartz itself is widespread; however, clusters with:

• Strong vertical crystal development
• Intact, well-defined terminations
• Clear contrast between quartz and specular hematite
• Stable matrix support
• Clean structural balance

are more desirable among collectors.

The preserved crystal integrity and defined iron mineralisation make this a solid mid-sized cabinet specimen with strong display character.

Each formation is entirely unique.

Care & Handling

Handle with care — natural crystal points may be delicate

Avoid impact or pressure on terminations

Clean gently with a soft, dry brush only

Will be carefully packed to protect crystal tips during transit