mineral

Tumbled green fluorite

Fluorite (calcium fluoride, CaF₂)

AI-generated identification · may be incorrect

Pale green, translucent, and glassy with internal cleavage fractures and cloudy zoning; hardness Mohs 4, cubic crystal system, perfect octahedral cleavage, and specific gravity about 3.18. The rounded form is mechanically tumbled and polished.

Identified August 13, 2026More mineral →

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Physical properties

Formation & geological history

Fluorite forms when fluorine-rich hydrothermal fluids fill veins, cavities, and replacement zones in limestone or other host rocks. Deposits range from Paleozoic to modern hydrothermal systems; exact age cannot be determined from the image.

Uses & applications

Used industrially as a flux in steel and aluminum production and as a source of hydrofluoric acid; attractive transparent pieces are used for carvings, cabochons, and mineral collecting.

Geological facts

Green color commonly results from trace rare-earth elements or radiation-related defects. Fluorite’s distinctive octahedral cleavage makes it relatively easy to fracture despite its attractive polish.

Field identification & locations

Identify by its moderate softness, glassy luster, cubic cleavage, and unusually heavy feel; a steel knife can scratch it, while quartz should not. Common sources include China, Mexico, the United States, England, and Mongolia.