Cubanite - CuFe₂S₃

Habit: Thick tabular and elongated prismatic crystals, usually massive. Brass to bronze-yellow Opaque, Metallic Luster.

Environment: Forms in Hydrothermal deposits, at fairly high temperatures. Commonly associated with chalcopyrite, pyrite, pyrrhotite, pentlandite and sphalerite.

Etymology: Named for its occurrence in Cuba