mineral

Fluorite (Yellow and Multi-color)

Calcium Fluoride (CaF2)

Hardness: 4 on Mohs scale; Color: Yellow, green, purple; Luster: Vitreous; Crystal structure: Isometric (cubic/octahedral); Cleavage: Perfect octahedral; Specific Gravity: 3.175-3.56

Hardness: 4 on Mohs scale
Color: Yellow, green, purple
Luster: Vitreous

Identified May 31, 2026More mineral →

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Physical properties

Hardness: 4 on Mohs scale; Color: Yellow, green, purple; Luster: Vitreous; Crystal structure: Isometric (cubic/octahedral); Cleavage: Perfect octahedral; Specific Gravity: 3.175-3.56

Formation & geological history

Formed primarily in hydrothermal veins, often associated with metallic ores like lead and silver. It crystallizes from hot aqueous solutions within the Earth's crust.

Uses & applications

Used as a flux in steel making, in the manufacture of aluminum, glass, and ceremics, as a source for fluorine in chemicals, and in lapidary work for jewelry and carvings.

Geological facts

Fluorite is famous for its wide range of colors and is often called 'the most colorful mineral in the world.' It gave its name to the phenomenon of fluorescence.

Field identification & locations

Identified by its octahedral cleavage and Mohs hardness of 4 (can be scratched by a steel blade but not a copper penny). It is commonly found in China, Mexico, and the UK.

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