Epidote is a green or yellow-green mineral that is commonly found in metamorphic rocks. It is composed of calcium, aluminum, iron, and silicon and is often associated with quartz and feldspar. Epidote has a hardness of 6.5 to 7 on the Mohs scale and has a vitreous luster. It can be used as an ornamental stone for jewelry and carvings, as well as for industrial purposes such as abrasives and polishing compounds.