• Chalcopyrite with sphalerite 

        Author(s):Raines, Ed; Mines Museum of Earth Science
        Date:2017
        Format:born digital; digital photographs
        Dull, brassy chalcopyrite crystals on resinous brown to darker brown sphalerite. Some of the sphalerite exhibits twinning according to the spinel law, some of which has a polysynthetic habit. This mineral specimen is from ...
      • Chalcopyrite with sphalerite 

        Author(s):Raines, Ed; Mines Museum of Earth Science
        Date:2017
        Format:born digital; digital photographs
        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.