mineral

Tumbled green fluorite (probable)

Fluorite, calcium fluoride (CaF₂)

AI-generated identification · may be incorrect

Small rounded, translucent pale-green specimen with vitreous-to-waxy luster; fluorite is Mohs 4, cubic, with perfect octahedral cleavage and specific gravity about 3.18. The image is slightly out of focus, so green aventurine or glass cannot be completely excluded.

Identified August 20, 2026More mineral →

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Physical properties

Formation & geological history

Fluorite forms mainly in hydrothermal veins and carbonate-hosted deposits, crystallizing from mineral-rich fluids at relatively low temperatures; specimens range from ancient to geologically recent deposits. Common sources include China, Mexico, England, the United States, and South Africa.

Uses & applications

Used as a flux in steel and aluminum production, in hydrofluoric-acid manufacture, and as an ornamental or collectible mineral; transparent colored material is sometimes cut as a gemstone.

Geological facts

Green fluorite commonly owes its color to trace elements or radiation-related defects. It fluoresces variably under ultraviolet light, often blue, violet, or green.

Field identification & locations

Check for cubic cleavage, a relatively soft surface, and strong density; a steel knife may scratch it, while quartz will not. Common localities include Illinois and Kentucky, China, Mexico, and the Derbyshire district of England.