mineral

Green fluorite (likely rough specimen)

Fluorite, calcium fluoride (CaF₂)

AI-generated identification · may be incorrect

Translucent blue-green, vitreous luster, with blocky cleavage surfaces; Mohs hardness 4 and cubic crystal structure. Color and appearance alone are not conclusive for identification.

Identified October 6, 2026More mineral →

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Physical properties

Translucent blue-green, vitreous luster, with blocky cleavage surfaces; Mohs hardness 4 and cubic crystal structure. Color and appearance alone are not conclusive for identification.

Formation & geological history

Fluorite commonly crystallizes from hydrothermal fluids in veins and cavities, often alongside quartz, calcite, or sulfide ores. Deposits occur in rocks of many ages.

Uses & applications

Used as an industrial flux and source of fluorine; attractive pieces are collected or cut into cabochons and ornaments, though its softness limits everyday jewelry use.

Geological facts

Fluorite has perfect octahedral cleavage and may fluoresce under ultraviolet light; the name reflects this fluorescence in some specimens.

Field identification & locations

Check for softness and cleavage, and confirm with a hardness or other mineral test; the pictured rough green material could also be another mineral. Fluorite is found worldwide, including China, Mexico, and the United States.