Epidote

Ca2(Al,Fe)3(SiO4)(Si2O7)O(OH)

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Epidote is a common metamorphic and hydrothermal mineral recognizable by its distinctive pistachio-green color. It forms in a wide range of rock types during metamorphism and is an important constituent of greenstone belts.

Crystal System Monoclinic
Mineral Class 09 Silicates
Mohs Hardness 6.0-7.0
Specific Gravity 3.25-3.50
Color Pistachio green, yellowish-green, dark green
Luster Vitreous
Streak Gray
Cleavage Perfect {001}
Fracture Uneven
Transparency Translucent
Crystal Habit Prismatic, columnar, fibrous

Mohs Hardness

Mohs Hardness: 6.0 – 7.0
1 Soft10 Hard

Crystal System

Monoclinic

Frequently Asked Questions

What is the hardness of Epidote?
Epidote has a Mohs hardness of 6.0-7.0.
What crystal system does Epidote belong to?
Epidote crystallizes in the Monoclinic crystal system.
What color is Epidote?
Epidote is typically Pistachio green, yellowish-green, dark green.
What type of luster does Epidote have?
Epidote exhibits a Vitreous luster.
What is the chemical formula of Epidote?
The chemical formula of Epidote is Ca2(Al,Fe)3(SiO4)(Si2O7)O(OH).