mineral

Purple fluorite-bearing matrix specimen

Fluorite (calcium fluoride, CaF₂), likely with quartz and host-rock minerals

AI-generated identification · may be incorrect

Violet, translucent fluorite crystals occur in a pale, granular matrix; fluorite has Mohs hardness 4, vitreous luster, cubic crystal structure, and perfect octahedral cleavage. The associated white material may be quartz or calcite, which cannot be confirmed from the image alone.

Identified August 11, 2026More mineral →

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Physical properties

Formation & geological history

Likely formed in hydrothermal veins when mineral-rich fluids deposited fluorite and accompanying quartz or calcite in fractures. Fluorite deposits range from Precambrian to Cenozoic in age and occur worldwide.

Uses & applications

Fluorite is used as a flux in steel and aluminum production, a source of fluorine, and occasionally as a gemstone; attractive crystal clusters are collected and displayed.

Geological facts

The purple color commonly results from irradiation, trace elements, or crystal defects. Fluorite’s octahedral cleavage and relatively low hardness distinguish it from similarly colored quartz.

Field identification & locations

Common localities include China, Mexico, Illinois and Kentucky, USA, England, Spain, and Morocco. Test cautiously: fluorite can be scratched by a steel knife, while quartz cannot; avoid destructive testing on a specimen.