mineral

Fluorite (Green)

Calcium Fluoride (CaF2)

Hardness: 4 on Mohs scale; Color: Pale to deep green; Luster: Vitreous (glassy); Crystal structure: Isometric (cubic); Cleavage: Perfect octahedral; Specific Gravity: 3.175–3.184.

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

Identified May 9, 2026More mineral →

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Physical properties

Hardness: 4 on Mohs scale; Color: Pale to deep green; Luster: Vitreous (glassy); Crystal structure: Isometric (cubic); Cleavage: Perfect octahedral; Specific Gravity: 3.175–3.184.

Formation & geological history

Typically formed in hydrothermal veins as a primary mineral, often associated with metallic ores. It can also occur in sedentary carbonate rocks and pegmatites. This specimen is noted as being from Madagascar.

Uses & applications

Used as a flux in steel making, in the production of hydrofluoric acid, and high-quality lenses for cameras/telescopes. Artistically used for carved ornaments, beads, and as a popular collector specimen.

Geological facts

The term 'fluorescence' is derived from fluorite, as many specimens glow strongly under UV light. It is one of the most colorful minerals in the world, earning the nickname 'the most colorful mineral in the world'.

Field identification & locations

Identified in the field by its hardness (can be scratched by a knife but not a copper coin), perfect octahedral cleavage, and vitreous luster. Often found in association with quartz, calcite, and galena.