Epidote

Hardness of 6-7 on Mohs scale, characteristic pistachio-green to yellowish-green color, vitreous luster, and monoclinic crystal system.

Forms through hydrothermal alteration of igneous rocks and regional metamorphism of impure limestones, commonly found in metamorphic and hydrothermal environments.

Primarily used as a mineral specimen for collectors and occasionally cut as a gemstone or used in decorative carvings.

Epidote gets its name from the Greek word for 'increase,' referring to the base of its crystal being longer than one side. It is a common index mineral in greenschist facies metamorphic rocks.

Easily identified by its distinct pistachio-green color and prismatic crystal habit. Commonly found worldwide in localities such as Austria, Pakistan, and the United States.