mineral

Green fluorite (likely)

Fluorite, calcium fluoride (CaF₂)

AI-generated identification · may be incorrect

Translucent pale to medium green, vitreous luster, and blocky cleavage surfaces; fluorite has Mohs hardness 4, cubic crystal structure, perfect octahedral cleavage, and specific gravity about 3.18. The rough, irregular specimen may also contain weathering or matrix inclusions.

Identified August 11, 2026More mineral →

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Physical properties

Formation & geological history

Forms mainly in hydrothermal veins and cavities associated with limestone, dolostone, and igneous rocks, typically during relatively low-temperature mineralization. Exact geological age and locality cannot be determined from the photograph.

Uses & applications

Used industrially as a flux in steel and aluminum production and as a source of fluorine; transparent colorful crystals are popular collector specimens. Green fluorite is occasionally cut as a gemstone but is relatively soft and prone to scratching.

Geological facts

Fluorite commonly fluoresces blue, violet, green, or cream under ultraviolet light, though fluorescence is locality-dependent. Its cubic cleavage and moderate softness help distinguish it from quartz and green glass.

Field identification & locations

Common sources include China, Mexico, the United States, England, and Namibia. Confirm with a hardness test, cleavage examination, and ideally UV response; visual identification is provisional because green glass or other minerals can look similar.