mineral

Green fluorite (rough fragment)

Fluorite, calcium fluoride (CaF₂)

AI-generated identification · may be incorrect

Typically pale green to blue-green with vitreous luster, translucent appearance, and prominent cubic cleavage; Mohs hardness 4, specific gravity about 3.18. The irregular breaks and internal cleavage surfaces fit rough fluorite, though green glass is a possible look-alike.

Identified August 23, 2026More mineral →

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Physical properties

Formation & geological history

Forms mainly in hydrothermal veins and cavities, commonly with quartz, calcite, barite, and sulfide minerals. Deposits range from Paleozoic to Cenozoic in age, depending on locality.

Uses & applications

Used industrially as a flux in steelmaking and as a source of fluorine and hydrofluoric acid; attractive transparent pieces are collected or cut as gemstones, though fluorite is relatively soft.

Geological facts

Fluorite often fluoresces strongly under ultraviolet light, commonly blue, violet, green, or cream. Its cubic cleavage is one of its most diagnostic features.

Field identification & locations

Common sources include China, Mexico, the United States, England, and South Africa. Confirm with a scratch test against a copper coin or steel blade, cleavage/cubic geometry, and UV fluorescence; avoid damaging valuable specimens.