mineral

Green fluorite cluster/geode

Fluorite (calcium fluoride, CaF₂), likely with quartz or minor sulfide inclusions

AI-generated identification · may be incorrect

Vivid green, translucent cubic crystals lining a cavity; vitreous luster and perfect octahedral cleavage. Mohs hardness 4; specific gravity about 3.18; cubic crystal system. The specimen appears partly polished or naturally broken to expose the druse-lined vug.

Identified August 17, 2026More mineral →

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Physical properties

Formation & geological history

Forms in hydrothermal veins and cavities when fluorine-rich fluids precipitate calcium fluoride, commonly alongside quartz, barite, and sulfides. Deposits occur in rocks ranging from Paleozoic to Cenozoic age, but the specimen’s exact age and locality cannot be determined from the image.

Uses & applications

Collected as a display mineral; fluorite is an important flux in steelmaking and aluminum production and a source of fluorine and hydrofluoric acid. Fine transparent crystals may be used as decorative or lapidary material, though this rough specimen is not jewelry-grade.

Geological facts

Green fluorite can show strong fluorescence under ultraviolet light, often blue or violet, depending on impurities. Its cubic crystal habit and unusually soft, perfect cleavage distinguish it from emerald and green quartz.

Field identification & locations

Common sources include China, Mexico, England, the United States, and Namibia. Confirm with cubic crystals, cleavage, hardness, and UV response; avoid scratching it because fluorite is relatively soft.