mineral

Fluorite

Calcium Fluoride (CaF2)

Hardness: 4 on Mohs scale; Color: Green, purple, blue, or colorless; Luster: Vitreous; Crystal structure: Cubic or octahedral; Cleavage: Perfect octahedral in four directions; Specific Gravity: 3.1-3.3

Hardness: 4 on Mohs scale
Color: Green, purple, blue, or colorless
Luster: Vitreous

Identified July 4, 2026More mineral →

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Physical properties

Formation & geological history

Commonly forms as a late-stage mineral in hydrothermal veins, often associated with lead and zinc ores. It can also be found in sedimentary rocks and pegmatites.

Uses & applications

Used as a flux in steel and aluminum manufacturing, in the production of hydrofluoric acid, as high-performance optical lenses, and for lapidary and jewelry purposes.

Geological facts

Fluorite is the origin of the term 'fluorescence' because many specimens glow under ultraviolet light. It is often called 'the most colorful mineral in the world'.

Field identification & locations

Identify by its hardness (softer than glass/quartz), perfect cleavage, and vibrant colors. Located worldwide with significant deposits in China, Mexico, and South Africa.