mineral

Green Fluorite

Fluorite (Calcium Fluoride, CaF2)

Hardness: 4 on Mohs scale; Color: Pale to deep emerald green; Luster: Vitreous (glass-like); Crystal structure: Isometric (cubic); Cleavage: Perfect octahedral in four directions; Specific gravity: 3.175–3.184

Hardness: 4 on Mohs scale
Color: Pale to deep emerald green
Luster: Vitreous (glass-like)

Identified May 9, 2026More mineral →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Formation & geological history

Commonly forms in hydrothermal veins where hot, mineral-rich underground fluids circulate through fractures in limestone or other rocks. It can also occur in granites and pegmatites. Significant deposits range from Paleozoic to Mesozoic eras.

Uses & applications

Used industrially as a flux in steel making, in the manufacture of hydrofluoric acid, and in high-performance telescope and camera lenses. In jewelry and collecting, it is used for cabochons and decorative carvings.

Geological facts

Fluorite is well known for its fluorescence under UV light, a property that actually takes its name from this mineral. It is often called 'the most colorful mineral in the world'.

Field identification & locations

Identified by its softness (can be scratched by a steel knife but not a copper penny) and its perfect four-way cleavage. Commonly found in Illinois (USA), China, Mexico, and England. Collectors look for clarity and deep color.