mineral

Green Fluorite

Fluorite (Calcium Fluoride, CaF2)

Hardness: 4 (Mohs scale); Color: Pale green to translucent; Luster: Vitreous (glassy); Crystal structure: Isometric (cubic); Cleavage: Perfect octahedral; Specific gravity: 3.18

Hardness: 4 (Mohs scale)
Color: Pale green to translucent
Luster: Vitreous (glassy)

Identified June 21, 2026More mineral →

Explore Green Fluorite in the encyclopedia →

Identify your own rocks.

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

App Store Google Play

Physical properties

Hardness: 4 (Mohs scale); Color: Pale green to translucent; Luster: Vitreous (glassy); Crystal structure: Isometric (cubic); Cleavage: Perfect octahedral; Specific gravity: 3.18

Formation & geological history

Formed through hydrothermal activity, often in veins or as a gangue mineral in metallic ore deposits. It frequently precipitates from hot, mineral-rich underground fluids as they cool.

Uses & applications

Primary source of fluorine for industrial chemicals, flux in steel smelting, ornamental carvings, and low-cost jewelry beads. High-quality clear specimens are used in laboratory-grade lenses.

Geological facts

Fluorite gave its name to the phenomenon of fluorescence because many specimens glow under ultraviolet light. It is often called the most colorful mineral in the world.

Field identification & locations

Identified in the field by its distinct green color, glassy luster, and relatively low hardness (can be scratched by a steel knife). Look for it in limestone or hydrothermal vein deposits in locations like Illinois, China, and Mexico.