Rock Identifier
Green Fluorite (Fluorite (Calcium Fluoride, CaF2)) — mineral
mineral

Green Fluorite

Fluorite (Calcium Fluoride, CaF2)

AI-generated identification · may be incorrect

Hardness: 4 on the Mohs scale. Color: Light to dark green, sometimes with white banding or inclusions. Luster: Vitreous to sub-vitreous. Crystal Structure: Isometric (cubic). Cleavage: Perfect octahedral cleavage in four directions. Specific Gravity: 3.18.

Hardness
4 on the Mohs scale
Luster
Vitreous to sub-vitreous
Identified More mineral
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Physical properties

Hardness: 4 on the Mohs scale. Color: Light to dark green, sometimes with white banding or inclusions. Luster: Vitreous to sub-vitreous. Crystal Structure: Isometric (cubic). Cleavage: Perfect octahedral cleavage in four directions. Specific Gravity: 3.18.

Formation & geological history

Formed in hydrothermal veins, often associated with metallic ores like lead and zinc, as well as in cavities in sedimentary rocks like limestone. It precipitates from fluorine-bearing aqueous solutions at varying temperatures.

Uses & applications

Widely used in ornamental carvings, crystal towers, and jewelry. Industrially, it is an important source of fluorine for hydrofluoric acid production and is used as a flux in steelmaking and glass manufacturing.

Geological facts

Fluorite gives the phenomenon of 'fluorescence' its name, as many specimens glow strongly under ultraviolet (UV) light due to trace impurities of yttrium or organic matter.

Field identification & locations

Easily identified by its relatively low hardness (can be scratched easily with a knife or glass), perfect octahedral cleavage, and characteristic glassy luster. Commonly found in China, Mexico, South Africa, and the USA.