Occurs in Pinal County. Common in Arizona.
Chemical Formula: Ca2(Al,Fe)3(SiO4)3(OH)
Specific Gravity: 3.4-3.5
Luster: Vitreous to subadamantine
Hardness: 6-7
Epidote is a calcium aluminum iron silicate mineral that is often found in metamorphic rocks. It can vary in color and is sometimes used as a gemstone.