mineral

Polished green fluorite

Fluorite, calcium fluoride (CaF₂)

AI-generated identification · may be incorrect

Likely translucent green fluorite with a vitreous luster, cubic crystal structure, and perfect octahedral cleavage; Mohs hardness 4 and specific gravity about 3.18. The squared, beveled shape appears cut and polished, with natural internal veils or inclusions.

Identified September 5, 2026More mineral →

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Physical properties

Formation & geological history

Forms mainly in hydrothermal veins and carbonate-hosted deposits, commonly with quartz, calcite, and barite. Deposits range from Paleozoic to younger geological ages; the exact source cannot be determined from the photograph.

Uses & applications

Used as a decorative or lapidary stone and, industrially, as a flux in steelmaking and as a source of hydrofluoric acid. It is generally unsuitable for durable jewelry because of its softness and cleavage.

Geological facts

Green fluorite commonly owes its color to trace elements or irradiation-related defects; exposure to heat or sunlight may fade some specimens. Fluorite is the reference mineral for fluorescence, though not every piece fluoresces.

Field identification & locations

Identify by its cubic habits, glassy luster, softness, and easy cleavage; a steel knife may scratch it, while quartz should not. Common sources include China, Mexico, Namibia, England, and the United States.