mineral

Banded fluorite (small rough fragment)

Fluorite, calcium fluoride (CaF₂)

AI-generated identification · may be incorrect

Pale blue-green and cream/yellow color zoning is visible; fluorite has a vitreous luster, cubic crystal structure, perfect octahedral cleavage, Mohs hardness 4, and specific gravity about 3.18. The image is too small to confirm the identification definitively.

Identified September 23, 2026More mineral →

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Physical properties

Formation & geological history

Fluorite typically crystallizes from hydrothermal fluids in veins and cavities, often alongside quartz, calcite, or sulfide minerals. Deposits occur in rocks of many ages; this specimen’s age and source cannot be determined from the image.

Uses & applications

Used as an industrial source of fluorine and in metallurgical flux; attractive banded pieces are also collected or cut for ornaments and jewelry.

Geological facts

Distinct color bands can form as mineral-rich fluids change composition during crystal growth.

Field identification & locations

Look for glassy surfaces and fluorite’s characteristic octahedral cleavage; it is softer than a knife blade and can be scratched by one. Common sources include China, Mexico, England, and the United States.