mineral

Green Fluorite

Fluorite (Calcium Fluoride - CaF2)

Hardness: 4 (Mohs scale); Color: Pale to deep green; Luster: Vitreous (glassy); Crystal structure: Isometric (cubic/octahedral); Cleavage: Perfect octahedral in four directions; Specific Gravity: 3.175 to 3.56.

Hardness: 4 (Mohs scale)
Color: Pale to deep green
Luster: Vitreous (glassy)

Identified March 30, 2026More mineral →

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Physical properties

Formation & geological history

Formed as a hydrothermal mineral in veins, often associated with metallic ores like lead and silver. Can be found in sedimentary limestone or as an accessory mineral in igneous rocks like granite. Ages range from Paleozoic to more recent quaternary deposits.

Uses & applications

Industrial uses as a flux in steel making, manufacture of hydrofluoric acid, and high-performance telescope/camera lenses. Used in jewelry (though soft) and is very popular for metaphysical collecting.

Geological facts

Fluorite is the origin of the word 'fluorescence' because many specimens glow under UV light. It is often called 'the most colorful mineral in the world' due to its wide range of hues.

Field identification & locations

Identify in the field by its 4-directional cleavage and ability to be scratched by a steel knife but not a copper penny. Found globally, with famous deposits in China, Mexico, England (Blue John), and the United States (Illinois/Kentucky).