mineral

Green fluorite (probable)

Fluorite, calcium fluoride (CaF₂)

AI-generated identification · may be incorrect

Pale mint-green, translucent, with vitreous-to-waxy luster and blocky cleavage surfaces; Mohs hardness 4, cubic crystal structure, perfect octahedral cleavage, and specific gravity about 3.18. The rounded edges suggest tumbling or abrasion.

Identified August 30, 2026More mineral →

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Physical properties

Formation & geological history

Forms mainly in hydrothermal veins and cavities with quartz, calcite, and metallic sulfide minerals, commonly in Paleozoic-to-Cenozoic ore deposits. Major sources include China, Mexico, England, Mongolia, and the United States.

Uses & applications

Used industrially as a flux in steel and aluminum production and as a source of hydrofluoric acid; transparent colorful pieces are collected or occasionally cut as gemstones, though they are too soft for durable everyday jewelry.

Geological facts

Fluorite can fluoresce strongly under ultraviolet light, often blue, purple, green, or cream. Green color commonly results from trace rare-earth elements or radiation-related defects.

Field identification & locations

Identify by its green color, softness, heavy feel, cubic habit, and characteristic cleavage; a hardness test and UV light help confirm it. The photograph alone cannot exclude green calcite, glass, or prehnite.