mineral

Polished fluorite point

Fluorite (calcium fluoride, CaF₂)

AI-generated identification · may be incorrect

Translucent green, purple, and colorless zoning with a glassy luster; hardness Mohs 4, cubic crystal structure, perfect octahedral cleavage, and specific gravity about 3.18. The elongated shape is cut and polished rather than natural crystal form.

Identified September 14, 2026More mineral →

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Physical properties

Formation & geological history

Fluorite forms from hydrothermal fluids in veins, cavities, and carbonate rocks, commonly alongside quartz, calcite, and sulfide minerals. Deposits range from Paleozoic to recent geological ages.

Uses & applications

Used industrially as a flux in steel and aluminum production and as a source of hydrofluoric acid; colorful material is cut into cabochons, points, carvings, and display specimens.

Geological facts

Fluorite commonly shows striking purple-green or banded color zoning and may fluoresce blue, violet, or green under ultraviolet light, depending on impurities.

Field identification & locations

Identify it by its vivid zoning, relatively soft surface, glassy appearance, and octahedral cleavage; a steel knife can scratch it, while quartz cannot. Common sources include China, Mexico, England, Spain, and the United States.