mineral

Epidote

Epidote (Ca2(Al,Fe)3(SiO4)3(OH))

AI-generated identification · may be incorrect

Hardness: 6-7 on Mohs scale; Color: Pistachio-green, yellowish-green, or blackish-green; Luster: Vitreous to resinous; Crystal structure: Monoclinic, typically prismatic crystals; Cleavage: Perfect in one direction; Specific gravity: 3.3-3.5

Hardness: 6-7 on Mohs scale
Color: Pistachio-green, yellowish-green, or blackish-green
Luster: Vitreous to resinous

Identified August 3, 2026More mineral →

Explore Epidote in the encyclopedia →

Identify your own rocks.

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

App Store Google Play

Physical properties

Formation & geological history

Forms primarily through regional and contact metamorphism of igneous rocks rich in calcium and iron, as well as in hydrothermal veins and skarns.

Uses & applications

Used primarily as mineral collector specimens and occasionally cut into cabochons or beads for jewelry.

Geological facts

The name epidote comes from a Greek word meaning 'increase,' referring to the base of its crystal prism having one side longer than the other. Fine crystals are highly prized by mineral collectors worldwide.

Field identification & locations

Easily identified in the field by its characteristic pistachio-green color and monoclinic crystal habits. Commonly found in locations such as the Alps, Pakistan, Austria, and various localities in the USA.