mineral

Tumbled green fluorite (probable)

Fluorite, calcium fluoride (CaF₂)

AI-generated identification · may be incorrect

Translucent pale green, vitreous luster, commonly cubic crystal structure and perfect octahedral cleavage; Mohs hardness 4, specific gravity about 3.18. The rounded edges indicate tumbling or polishing.

Identified September 4, 2026More mineral →

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Physical properties

Formation & geological history

Forms mainly in hydrothermal veins and replacement deposits, often with quartz, calcite, galena, or barite; specimens commonly range from Paleozoic to Cenozoic in age. The image is somewhat out of focus, so identification is provisional.

Uses & applications

Used as a flux in steel and aluminum production, as a source of fluorine, and as a decorative or collecting stone; attractive transparent material may be faceted, though it is relatively soft.

Geological facts

Green fluorite may show color zoning, purple edges, or fluorescence under ultraviolet light. Its cubic cleavage distinguishes it from many similarly colored polished stones.

Field identification & locations

Check for cubic zoning, glassy luster, and easy scratching by a steel knife; avoid this destructive test on valuable pieces. Common sources include China, Mexico, Mongolia, England, and Illinois, USA.