Epidote is an great display mineral, creating delicate elongated crystals that are extremely lustrous and often interconnected. This form is highly treasured by collectors and creates a fine mineral showpiece. The color of Epidote is mostly  green--in all different shades and tones--with a pistachio color typical. Epidote occurs in marble and schistose rocks. It is also a product of hydrothermal alteration of various minerals: feldspars, micas, pyroxenes, amphiboles, & garnets) composing igneous rocks.