mineral

Pale blue-green fluorite (rough crystal)

Fluorite, calcium fluoride (CaF₂)

AI-generated identification · may be incorrect

Translucent pale blue-green with a vitreous luster and uneven, partly cleavage-shaped surfaces. Hardness 4 Mohs; cubic crystal system; perfect octahedral cleavage; specific gravity about 3.2.

Identified October 2, 2026More mineral →

Explore Pale blue-green fluorite (rough crystal) in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Translucent pale blue-green with a vitreous luster and uneven, partly cleavage-shaped surfaces. Hardness 4 Mohs; cubic crystal system; perfect octahedral cleavage; specific gravity about 3.2.

Formation & geological history

Forms in hydrothermal veins and cavities, commonly with quartz, calcite, and sulfide minerals. Fluorite deposits occur across many geological ages; the specimen’s age and locality cannot be determined from the image.

Uses & applications

Used as an industrial flux and source of fluorine; attractive crystals are collected and occasionally cut for jewelry, though fluorite is relatively soft.

Geological facts

Fluorite commonly fluoresces under ultraviolet light, a property named after the mineral. Its strong cleavage makes it easy to split but prone to damage.

Field identification & locations

The blue-green color, translucence, and cubic mineral habit suggest fluorite; confirm with a hardness test (it scratches easily with a steel point) and cleavage. Common localities include China, Mexico, England, and the United States.