mineral

Fluorite

Calcium fluoride (CaF2)

AI-generated identification · may be incorrect

Hardness: 4 on Mohs scale. Color: Variable, typically purple, green, yellow, or clear. Luster: Vitreous. Crystal structure: Isometric (cubic). Cleavage: Perfect in four directions (octahedral). Specific gravity: 3.175-3.184.

Hardness: 4 on Mohs scale
Color: Variable, typically purple, green, yellow, or clear
Luster: Vitreous

Identified September 5, 2026More mineral →

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Physical properties

Formation & geological history

Forms in hydrothermal veins, often associated with metallic ores like lead and zinc, and in some igneous rocks like granites and pegmatites.

Uses & applications

Used in metallurgy as a flux, in the manufacture of opalescent glass and enamels, and in the chemical industry to produce hydrofluoric acid. Also popular among collectors and sometimes used in jewelry, though its softness makes it less suitable for everyday wear.

Geological facts

Fluorite is the mineral that gave the phenomenon of fluorescence its name. Some specimens glow under ultraviolet light.

Field identification & locations

Identified by its octahedral cleavage, relative softness (can be scratched by a steel knife), and typical colors. Common worldwide, with notable deposits in China, Mexico, South Africa, and the USA.