mineral

Rainbow Fluorite

Fluorite (Calcium Fluoride, CaF2)

AI-generated identification · may be incorrect

Hardness 4 on Mohs scale; vitreous luster; isometric crystal system with perfect octahedral cleavage; displays characteristic green and purple color banding, often transparent to translucent; specific gravity 3.18.

Identified October 3, 2026More mineral →

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Physical properties

Formation & geological history

Formed via hydrothermal activity in veins and fractures, often associated with lead, zinc, and silver ores, or in pegmatites and carbonate rocks.

Uses & applications

Popular as carved ornamental items, cabochons, polished eggs, and metaphysical specimens; industrially used as a flux in steel smelting, fluorochemical production (hydrofluoric acid), and high-performance optical lenses.

Geological facts

Fluorite gave its name to the phenomenon of 'fluorescence' because many specimens glow brightly under ultraviolet light. It is also the defining mineral for hardness 4 on the Mohs hardness scale.

Field identification & locations

Identified by its softness (can be scratched easily with a steel nail or knife), distinctive triangular/octahedral internal cleavage fractures, and multi-colored purple-green zoning. Major sources include China, Mexico, England, and Madagascar.