mineral

Green fluorite crystal

Fluorite (calcium fluoride, CaF₂)

AI-generated identification · may be incorrect

A transparent to translucent, pale green crystal with vitreous luster and cubic crystal structure; fluorite has Mohs hardness 4 and perfect octahedral cleavage. The image suggests a single crystal, though its exact identity cannot be confirmed from appearance alone.

Identified September 24, 2026More mineral →

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Physical properties

Formation & geological history

Fluorite typically forms in hydrothermal veins and cavities, often with quartz, calcite, or sulfide minerals. Deposits span many geological ages; the specimen’s age and locality cannot be determined from the image.

Uses & applications

Used as a flux in steelmaking and as a source of fluorine; clear, colorful crystals are collected and sometimes cut for jewelry, though softness limits wearability.

Geological facts

Fluorite commonly fluoresces under ultraviolet light, a property named after the mineral. Its cubic crystals can cleave into distinctive octahedral forms.

Field identification & locations

Look for glassy luster, cubic or octahedral forms, and cleavage; hardness 4 means it can be scratched by a steel knife. Fluorite occurs worldwide, including China, Mexico, and the United States.