mineral

Blue-green fluorite (likely tumbled/polished)

Fluorite, calcium fluoride (CaF₂)

AI-generated identification · may be incorrect

Typically translucent blue-green with vitreous luster; Mohs hardness 4, cubic crystal structure, and perfect octahedral cleavage. Specific gravity is about 3.18; the rounded edges and surface scratches indicate polishing or tumbling.

Identified August 7, 2026More mineral →

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Physical properties

Formation & geological history

Forms mainly in hydrothermal veins and cavities, often with quartz, calcite, and sulfide minerals. It occurs in many geological ages, with major deposits in China, Mexico, England, South Africa, and the United States.

Uses & applications

Used as a flux in steel and aluminum production, a source of fluorine, and occasionally as ornamental or collectible material. Transparent, strongly colored fluorite is used for carvings and display rather than durable jewelry.

Geological facts

Fluorite commonly fluoresces blue, purple, green, or cream under ultraviolet light; the color may result from rare-earth elements or radiation-related defects. The specimen’s bright turquoise appearance can also be enhanced by lighting or surface treatment.

Field identification & locations

Identify by its glassy luster, cubic cleavage, moderate softness, and possible UV fluorescence; it should scratch more easily than quartz. The image could alternatively show dyed glass or resin, so a hardness, density, and cleavage test is needed for confirmation.