Epidote

Characterized by its peculiar green color and one perfect cleavage, this mineral was discovered in 1801 in France. It forms during the metamorphism of an impure limestone and is especially characteristic of contact metamorphic deposits in limestone. The name comes from the Greek word meaning "increase," in allusion to the crystal characteristic of one longer side at the base of the prism.

Mineral Photos courtesy of R.Weller/Cochise College