Chalcopyrite with sphalerite

Abstract

Brassy chalcopyrite crystals on very dark brown to resinous brown sphalerite crystals. This mineral specimen is from the Bachelor mine, Amethyst vein system, Creede mining district, Colorado.

For more information about the Minerals of Creede, Colorado and the collection, see: http://libguides.mines.edu/GeologyMuseum/digitalcollectionsCreede.