: It commonly forms perfect cubic, octahedral, or pyritohedral (12-faced) crystals.
Beyond the Deceptive Luster: A Brief Study of "Fool's Gold" (Pyrite) "Fool's Gold," scientifically known as ( FeS2cap F e cap S sub 2
Pyrite forms in a wide variety of environments, including igneous, metamorphic, and sedimentary rocks. The Many Faces of Fool's Gold | American Scientist