mineral

Tumbled/polished purple fluorite (probable)

Fluorite, calcium fluoride (CaF₂)

AI-generated identification · may be incorrect

Violet to blue-purple, translucent, vitreous-to-waxy luster, and commonly showing cubic cleavage; Mohs hardness 4, specific gravity about 3.18. The rounded edges and glossy surface indicate human polishing or tumbling.

Identified September 8, 2026More mineral →

Explore Tumbled/polished purple fluorite (probable) 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

Forms mainly in hydrothermal veins and replacement deposits, often with quartz, calcite, galena, or barite; deposits range from Paleozoic to younger Cenozoic ages. The image alone cannot establish locality or exact identification.

Uses & applications

Used as a flux in steel and aluminum production, in hydrofluoric-acid manufacture, and as ornamental or collectible material; fine transparent pieces may be cut as gemstones but are relatively soft.

Geological facts

Purple color commonly results from radiation-related color centers or trace elements. Fluorite’s excellent cleavage makes it prone to chipping, and its cubic crystals are a key diagnostic feature.

Field identification & locations

Look for cubic cleavage, moderate weight, softness, and a glassy purple appearance; a steel knife may scratch it, while quartz should not. Common sources include China, Mexico, England, Spain, Illinois, and Colorado.