mineral

Green Fluorite

Fluorite (Calcium Fluoride) - CaF2

Hardness: 4 on Mohs scale; Color: Pale green to mint green; Luster: Vitreous (glassy); Crystal structure: Isometric (cubic); Cleavage: Perfect octahedral in four directions; Specific gravity: 3.18

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

Identified March 28, 2026More mineral →

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Physical properties

Hardness: 4 on Mohs scale; Color: Pale green to mint green; Luster: Vitreous (glassy); Crystal structure: Isometric (cubic); Cleavage: Perfect octahedral in four directions; Specific gravity: 3.18

Formation & geological history

Formed through hydrothermal activity in veins and within sedimentary rocks. Often found in association with lead and zinc ores. Age varies by deposit, ranging from Paleozoic to more recent formations.

Uses & applications

Used as a flux in steel making, in the production of hydrofluoric acid, and high-quality optical lenses. Green specimens are commonly used for lapidary work, cabochons, and metaphysical collecting.

Geological facts

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

Field identification & locations

Identify in the field by its distinct 4-directional cleavage and ability to be scratched by a steel knife but not a copper penny. Commonly found in Illinois (USA), China, and Mexico. Use a hardness test to distinguish from quartz (which is harder).