mineral

Fluorite (Polished Point/Tower)

Calcium Fluoride (CaF2)

Hardness: 4 on Mohs scale; Color: Multi-colored (purple, green, and clear bands); Luster: Vitreous (glass-like); Crystal structure: Isometric (cubic); Cleavage: Perfect octahedral; Specific Gravity: 3.0 to 3.25.

Hardness: 4 on Mohs scale
Color: Multi-colored (purple, green, and clear bands)
Luster: Vitreous (glass-like)

Identified March 11, 2026More mineral →

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Physical properties

Formation & geological history

Formed through hydrothermal activity, often in veins alongside metallic ores like lead and silver. It precipitates from hot, mineral-rich fluids passing through fissures in the Earth's crust. It can be found in limestone and dolomite host rocks.

Uses & applications

Used in the manufacture of steel, aluminum, and hydrofluoric acid. High-purity specimens are used for specialized optical lenses. In its polished form (like the specimen shown), it is widely used for home decor, metaphysical purposes, and lapidary art.

Geological facts

Fluorite is naturally thermoluminescent and fluorescent under UV light (a property named after the mineral). It is often called 'the most colorful mineral in the world' due to the wide range of hues caused by elemental impurities.

Field identification & locations

Identify in the field by its distinct 4-way cleavage and softness (can be scratched by a steel knife but not a penny). This specific tower shape is man-made (cut and polished). Common locations include China, Mexico, South Africa, and the Illinois-Kentucky district in the USA.

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