mineral

Green fluorite (tentative identification)

Fluorite, calcium fluoride (CaF₂)

AI-generated identification · may be incorrect

Pale green, translucent to opaque, with a vitreous-to-dull surface and irregular, rounded shape. Fluorite has Mohs hardness 4 and cubic crystals with perfect octahedral cleavage; the worn surface makes these features difficult to confirm from the photo.

Identified September 30, 2026More mineral →

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Physical properties

Formation & geological history

Fluorite commonly crystallizes from mineral-rich hydrothermal fluids in veins and cavities, often alongside quartz or calcite. Its age depends on the deposit; this specimen’s source and age cannot be determined visually.

Uses & applications

Fluorite is used as a flux in steelmaking and as a source of fluorine; attractive pieces are collected or cut for display, though its softness limits jewelry use.

Geological facts

Fluorite is often fluorescent under ultraviolet light, but fluorescence is not guaranteed and does not alone confirm identification.

Field identification & locations

The pale green color and translucent, rounded appearance are consistent with fluorite, but the photo is insufficient for a certain identification. Check hardness only on an inconspicuous spot: fluorite can be scratched by a steel knife, unlike quartz; common sources include China, Mexico, and Illinois, USA.