mineral

Tumbled fluorite (probable)

Fluorite, calcium fluoride (CaF₂)

AI-generated identification · may be incorrect

Pale blue-green to lavender, translucent with a waxy-to-glassy luster; cubic crystal structure and perfect octahedral cleavage. Mohs hardness 4; specific gravity about 3.18. The rounded edges indicate tumbling or polishing.

Identified September 6, 2026More mineral →

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Physical properties

Formation & geological history

Fluorite forms when hydrothermal fluids fill veins and cavities, commonly with quartz, calcite, and sulfide minerals. Deposits range from Paleozoic to recent geological ages, depending on locality.

Uses & applications

Used industrially as a flux in steel and aluminum production and as a source of fluorine; attractive transparent pieces are collected or cut as gemstones. This small tumbled specimen has modest commercial value.

Geological facts

Fluorite is famous for vivid purple, green, blue, yellow, and color-zoned crystals, often forming cubes. Some specimens fluoresce strongly under ultraviolet light.

Field identification & locations

Check for cubic zoning, octahedral cleavage, relatively low hardness, and possible UV fluorescence; similar pale material may be calcite or glass. Common localities include China, Mexico, the United States, England, and Morocco.