mineral

Tumbled green fluorite (probable)

Fluorite, calcium fluoride (CaF₂)

AI-generated identification · may be incorrect

Pale mint-green, translucent, glassy to waxy luster with internal zoning, fractures, and possible cubic cleavage; Mohs hardness 4; cubic crystal system; specific gravity about 3.18. The rounded form indicates tumbling and polishing.

Identified September 22, 2026More mineral →

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Physical properties

Formation & geological history

Forms mainly in hydrothermal veins and cavities, often with quartz, calcite, and sulfide minerals; deposits range from Paleozoic to younger geologic ages. Common sources include China, Mexico, the United Kingdom, and the United States.

Uses & applications

Used as a flux in steel and aluminum production, in hydrofluoric-acid manufacture, and as a collectible or ornamental stone; its softness limits jewelry durability.

Geological facts

Green fluorite commonly shows color zoning and can fluoresce under ultraviolet light, typically blue, violet, or green. Identification from a photograph is provisional because similar green calcite, prehnite, or glass are possible.

Field identification & locations

Look for cubic cleavage, relatively low hardness, translucent zoning, and a cool glassy feel; a steel knife should scratch it, while quartz should not. Acid testing is inappropriate; verify with hardness, specific gravity, and cleavage tests.