mineral

Possible blue-green fluorite rough

Fluorite (calcium fluoride, CaF₂); identification is provisional from the image

AI-generated identification · may be incorrect

Pale blue-green, translucent with a vitreous-to-waxy luster and angular faces; fluorite has Mohs hardness 4, cubic crystal structure, and perfect octahedral cleavage. The image does not show enough detail to verify these diagnostic properties.

Identified September 27, 2026More mineral →

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Physical properties

Formation & geological history

Fluorite commonly crystallizes from hydrothermal fluids in veins and cavities, often alongside quartz or calcite; deposits range from ancient to geologically recent.

Uses & applications

Used as an industrial flux and source of fluorine; transparent, colorful pieces are cut for jewelry or kept as specimens.

Geological facts

Fluorite fluoresces under ultraviolet light in some varieties, a property named after the mineral.

Field identification & locations

Check for softness (a steel point can scratch it) and octahedral cleavage; similar-looking blue-green minerals include calcite and glass. Found worldwide, including China, Mexico, and the United States.