mineral

Purple fluorite crystal

Fluorite (calcium fluoride, CaF₂)

AI-generated identification · may be incorrect

Typically purple to violet, with a vitreous luster and cubic crystal structure; perfect octahedral cleavage, Mohs hardness 4, and specific gravity about 3.18. The specimen appears to be a small rough, translucent purple fragment, though the image is not sufficient for absolute identification.

Identified August 22, 2026More mineral →

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Physical properties

Formation & geological history

Forms primarily in hydrothermal veins and cavities associated with limestone, dolostone, and metallic ore deposits. Fluorite deposits range from Paleozoic to relatively young, with age depending on locality.

Uses & applications

Used industrially as a flux in steel and aluminum production, in hydrofluoric-acid manufacture, and as an ornamental or collecting mineral; attractive purple material is occasionally cut into cabochons.

Geological facts

Purple coloration commonly results from radiation-related color centers and trace impurities. Fluorite’s cleavage and relatively low hardness distinguish it from quartz and amethyst.

Field identification & locations

Look for cubic crystals, four-way cleavage producing octahedral fragments, and easy scratching with a steel blade; it is commonly found in China, Mexico, England, the United States, and Morocco. The visible specimen could alternatively be another purple mineral or glassy material without testing.