mineral

Yellow fluorite crystal

Fluorite (calcium fluoride, CaF₂)

AI-generated identification · may be incorrect

Pale yellow to honey-colored, translucent, with vitreous luster and cubic crystal structure; Mohs hardness 4, perfect octahedral cleavage, specific gravity about 3.2. The piece’s blocky shape and cleavage faces are consistent with fluorite.

Identified October 3, 2026More mineral →

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Physical properties

Formation & geological history

Forms when fluorine-rich hydrothermal fluids deposit minerals in fractures and cavities, often in limestone or dolostone. Such deposits occur across many geological ages; the specimen’s exact age and source cannot be determined from the image.

Uses & applications

Fluorite is an important source of fluorine for chemical and metallurgical industries, and is also collected and used as an ornamental or display mineral.

Geological facts

Fluorite commonly fluoresces under ultraviolet light, a property named after the mineral. Its relatively low hardness and distinctive cleavage make it prone to chipping.

Field identification & locations

Look for cubic forms, four-direction cleavage producing octahedral fragments, and hardness low enough to be scratched by a steel knife. Common localities include China, Mexico, England, and the United States.