mineral

Green fluorite (likely rough specimens)

Fluorite, CaF₂

AI-generated identification · may be incorrect

Green, translucent to opaque pieces with a glassy luster; Mohs hardness 4, cubic crystal structure, perfect octahedral cleavage, and specific gravity about 3.2. Color and shape in the photo are not sufficient for definitive identification.

Identified October 11, 2026More mineral →

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Physical properties

Formation & geological history

Fluorite commonly crystallizes from hydrothermal fluids in veins and cavities, often with quartz, calcite, or sulfide minerals. Such deposits formed across many geological ages.

Uses & applications

Used as a flux in steelmaking, a source of fluorine chemicals, and as a decorative or collectible mineral; transparent material may be cut as a gemstone, though it is relatively soft.

Geological facts

Fluorite often fluoresces under ultraviolet light, a property named after the mineral. Green color can result from trace impurities or radiation-related defects.

Field identification & locations

Check for cubic crystal faces, strong cleavage, and hardness near 4; it is softer than a steel knife. Fluorite occurs worldwide, including China, Mexico, the United States, and England.