mineral

Green fluorite (rough specimen)

Fluorite, calcium fluoride (CaF₂)

AI-generated identification · may be incorrect

Pale green, translucent to transparent with a vitreous luster and prominent cubic cleavage; Mohs hardness 4, specific gravity about 3.18. The irregular form and internal fractures are consistent with rough fluorite, though green calcite or glassy slag are possible visual alternatives.

Identified August 17, 2026More mineral →

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Physical properties

Formation & geological history

Fluorite commonly forms in hydrothermal veins and replacement deposits, often with quartz, calcite, barite, and sulfide minerals; deposits range from Paleozoic to Cenozoic in age. It crystallizes in the cubic system.

Uses & applications

Used industrially as a source of fluorine and flux in steel, aluminum, and glass production; attractive transparent pieces are cut as gemstones or kept by collectors. Rough common specimens generally have modest value.

Geological facts

Green coloration can result from rare-earth elements, radiation-related defects, or included minerals. Fluorite commonly fluoresces blue, violet, green, or white under ultraviolet light, but fluorescence is not guaranteed.

Field identification & locations

Look for cubic cleavage, relatively soft surfaces, and a cold, heavy feel; it should scratch with a steel knife but not ordinary glass reliably. Common sources include China, Mexico, England, the United States, and South Africa; acid testing is unnecessary and can damage associated minerals.