mineral

Green Fluorite

Fluorite (Calcium Fluoride, CaF2)

Hardness: 4 on Mohs scale. Color: Pale to mint green. Luster: Vitreous (glassy). Crystal structure: Isometric (cubic/octahedral). Cleavage: Perfect octahedral. Specific Gravity: 3.17 to 3.56.

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

Identified June 6, 2026More mineral →

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Physical properties

Hardness: 4 on Mohs scale. Color: Pale to mint green. Luster: Vitreous (glassy). Crystal structure: Isometric (cubic/octahedral). Cleavage: Perfect octahedral. Specific Gravity: 3.17 to 3.56.

Formation & geological history

Forms primarily in hydrothermal veins from mineral-rich fluids. It is also found in the cavities of sedimentary rocks like limestone and sometimes as an accessory mineral in igneous rocks like granite. Found across all geological ages.

Uses & applications

Mainly used as a flux in steel making, the manufacture of hydrofluoric acid, and high-quality optical lenses. Green fluorite is popular for jewelry, carvings, and as a collector's mineral.

Geological facts

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

Field identification & locations

Identify in the field by its distinct 4-directional cleavage and glassy luster. It is much softer than quartz (which it can resemble) and can be scratched by a steel knife but not a copper penny. Common locations include China, Mexico, South Africa, and the USA (Illinois/Kentucky).