mineral

Polished fluorite

Fluorite (calcium fluoride, CaF₂)

AI-generated identification · may be incorrect

The small polished specimen appears pale green and purple, a common fluorite color combination. Fluorite has Mohs hardness 4, vitreous luster, cubic crystals, and perfect octahedral cleavage; the photo does not permit reliable confirmation.

Identified September 26, 2026More mineral →

Explore Polished fluorite in the encyclopedia →

Identify your own rocks.

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

App Store Google Play

Physical properties

Formation & geological history

Fluorite commonly crystallizes from hydrothermal fluids in veins and cavities, often alongside quartz, calcite, or sulfide minerals. It forms in many geological periods; this specimen’s age and locality cannot be determined from the image.

Uses & applications

Used as a source of fluorine in chemical and metallurgical industries, and as ornamental material or a collector’s mineral; its softness limits everyday jewelry use.

Geological facts

Fluorite often fluoresces under ultraviolet light, a phenomenon named after the mineral. Its colors can zone within a single crystal.

Field identification & locations

The purple-and-green coloration and polished surface suggest fluorite, but confirm with a hardness test on an inconspicuous area: fluorite is softer than a steel nail. It is found worldwide, including China, Mexico, and the United States.