mineral

Raw green fluorite (probable)

Fluorite, calcium fluoride (CaF₂)

AI-generated identification · may be incorrect

Pale blue-green to turquoise, translucent, with vitreous-to-waxy luster and visible cubic cleavage; Mohs hardness 4, cubic crystal system, specific gravity about 3.18. The rough, blocky form and strong cleavage support fluorite, though green calcite or dyed material are alternatives.

Identified August 11, 2026More mineral →

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Physical properties

Formation & geological history

Forms mainly in hydrothermal veins and replacement deposits, often with quartz, calcite, barite, or sulfides; specimens range from ancient Precambrian deposits to younger Phanerozoic veins. Common sources include China, Mexico, England, Illinois, and Colorado.

Uses & applications

Used industrially as a flux in steelmaking and as a source of fluorine; clear colorful crystals are popular collector specimens, while cut fluorite is occasionally used for ornamental objects and cabochons.

Geological facts

Fluorite commonly fluoresces blue, violet, green, or cream under ultraviolet light, and its name reflects this property. It cleaves readily into octahedral fragments and is softer than ordinary steel or glass.

Field identification & locations

Check for cubic zoning, octahedral cleavage, hardness near 4, and UV fluorescence; avoid scratching a valuable specimen. Typical rough pieces sell for $5–$30, while well-formed or strongly fluorescent specimens may bring $50–$300+.