mineral

Blue-green mineral specimen, likely fluorite

Fluorite (calcium fluoride, CaF₂), tentative identification

AI-generated identification · may be incorrect

The small rough specimen appears blue-green with a vitreous luster, but image detail is insufficient to confirm crystal form or cleavage. Fluorite has Mohs hardness 4, cubic crystals, perfect octahedral cleavage, and specific gravity about 3.18.

Identified August 15, 2026More mineral →

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Physical properties

Formation & geological history

Fluorite commonly forms in hydrothermal veins and carbonate-hosted deposits, crystallizing from mineral-rich fluids over many geological ages. The specimen may also be dyed or coated, so natural color cannot be established from the photograph.

Uses & applications

Used industrially as a source of fluorine and flux in steelmaking and glass production; attractive crystals are collected and occasionally cut as gemstones. This small specimen has primarily decorative or educational value.

Geological facts

Blue, green, and multicolored fluorite are common, and fluorite often fluoresces under ultraviolet light. Cubic faces or triangular octahedral cleavage surfaces are useful diagnostic features.

Field identification & locations

Common localities include China, Mexico, England, Illinois, and New Mexico. Test cautiously for cubic/octahedral cleavage and hardness; avoid scratching the specimen if its surface is coated or polished.