mineral

Green fluorite (rough specimen)

Fluorite, calcium fluoride (CaF₂)

AI-generated identification · may be incorrect

Pale green, translucent with a vitreous-to-dull luster and prominent planar cleavage. Fluorite is cubic and has Mohs hardness 4; the image alone cannot confirm composition or specific gravity (about 3.18).

Identified September 28, 2026More mineral →

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Physical properties

Formation & geological history

Fluorite commonly crystallizes from hydrothermal fluids in veins and cavities, often with calcite, quartz, or sulfide minerals. It forms across many geological ages; this specimen’s age and locality cannot be determined visually.

Uses & applications

Used as a flux in steelmaking, a source of fluorine chemicals, and as an ornamental or collector mineral; transparent material is sometimes cut as a gemstone.

Geological facts

Fluorite characteristically has perfect octahedral cleavage and may fluoresce under ultraviolet light, though not all specimens do.

Field identification & locations

The pale green color and cleavage-like flat surfaces are consistent with fluorite, but calcite and other minerals can look similar. Test hardness cautiously—fluorite can be scratched by a steel tool—and avoid destructive tests on a valuable specimen.