• Galena, sphalerite, and dolomite/ankerite and minor pyrite 

        Contributor:Raines, Ed; Colorado School of Mines. Geology Museum
        Date:2018
        Metallic-gray galena cubes and small shiny black sphalerite crystals mixed with zoned white rhombohedrons of dolomite covered by an outer layer of tan ankerite. Minor pyrite crystals are also scattered over the specimen ...
      • Tetrahedrite and Chalcopyrite with pyrite and dolomite 

        Contributor:Raines, Ed; Colorado School of Mines. Geology Museum
        Date:2018
        Metallic-gray tetrahedrite crystals (many oriented as chains of crystals alligned in parallel growth) mixed with brassy yellow chalcopyrite. Lesser amounts of brassy pyrite and white dolomite are scattered in the mix. ...
      • Rhodochrosite with pyrite 

        Contributor:Raines, Ed; Colorado School of Mines. Geology Museum
        Date:2018
        A close-up photographic view of a plate of small pyrite crystals partially covered by intergrown rhodochrosite crystals exhibiting a discoidal, flattened rhombohedral form. This mineral specimen is from the Eagle mine, ...
      • Pyrite with sphalerite 

        Contributor:Raines, Ed; Colorado School of Mines. Geology Museum
        Date:2018
        Intergrowth of pyrite crystals exhibiting cubic and pyritohedral crystal forms with shiny, jet-black sphalerite crystals from the Eagle mine, Gilman mining district, Eagle County, Colorado.
      • Sphalerite 

        Contributor:Raines, Ed; Colorado School of Mines. Geology Museum
        Date:2018
        Plate of shiny, jet black sphalerite crystals from the Eagle mine, Gilman mining district, Eagle County, Colorado.
      • Pyrite 

        Contributor:Raines, Ed; Colorado School of Mines. Geology Museum
        Date:2018
        A cluster of pyrite crystals exhibiting the pyritohedral crystal form. Mineral specimen is from the Eagle mine, Gilman mining district, Eagle County, Colorado.
      • Pyrite, pseudomorph after marcasite with pyrite and sphalerite 

        Contributor:Raines, Ed; Colorado School of Mines. Geology Museum
        Date:2018
        Several large clusters of intergrown (former) marcasite crystals that have been replaced by pyrite--on pyrite, on sphalerite. This mineral specimen is from the Eagle mine, Gilman mining district, Eagle County, Colorado.
      • Pyrite with dolomite 

        Contributor:Raines, Ed; Colorado School of Mines. Geology Museum
        Date:2018
        Tiny, tarnished pyrite with sphalerite on pearly crystals of dolomite. This mineral specimen is from the Eagle mine, Gilman mining district, Eagle County, Colorado.
      • Sphalerite variety schalenblende 

        Contributor:Raines, Ed; Colorado School of Mines. Geology Museum
        Date:2018
        Plate of interlocking spheres (botyroidal growth) of sphalerite, referred to as "Schalenblende", from the Eagle mine, Gilman mining district, Eagle County, Colorado.
      • Barite 

        Contributor:Raines, Ed; Colorado School of Mines. Geology Museum
        Date:2018
        Intergrowth of translucent to transparent golden-brown barite crystals on matrix from the Rocky Point claim, Eagle mine, Gilman mining district, Eagle County, Colorado.
      • Pyrite 

        Contributor:Raines, Ed; Colorado School of Mines. Geology Museum
        Date:2018
        Plate of interlocking pyritohedral crystals of pyrite from the Eagle mine, Gilman mining district, Eagle County, Colorado.
      • Pyrite 

        Contributor:Raines, Ed; Colorado School of Mines. Geology Museum
        Date:2018
        Small plate of bright, shiny pyrite crystals from the Eagle mine, Gilman mining district, Eagle County, Colorado.
      • Siderite 

        Contributor:Raines, Ed; Colorado School of Mines. Geology Museum
        Date:2018
        A large plate of interlocking, flattened (disc-shaped) rhombohedral, tan siderite crystals from the Eagle mine, Gilman mining district, Eagle County, Colorado.
      • Pyrite pseudomorphs after marcasite with minor sphalerite and galena overgrowths 

        Contributor:Raines, Ed; Colorado School of Mines. Geology Museum
        Date:2018
        Cluster of intergrown (former) marcasite crystals that have been replaced by pyrite. Some surfaces have minor overgrowths of galena and sphalerite. This mineral specimen is from the Eagle mine, Gilman mining district, ...
      • Fluorapatite, chalcopyrite, and sphalerite on pyrite 

        Contributor:Raines, Ed; Colorado School of Mines. Geology Museum
        Date:2018
        Squatty, glassy prisms of fluorapatite scattered in among chalcopyrite and sphalerite crystals. This mineral specimen is from the Eagle mine, Gilman mining district, Eagle County, Colorado.
      • Chalcopyrite with minor tetrahedrite-tennantite 

        Contributor:Raines, Ed; Colorado School of Mines. Geology Museum
        Date:2018
        A large plate of intergrown chalcopyrite crystals with very minor tetrahedrite-tennantite from the Eagle mine, Gilman mining district, Eagle County, Colorado.
      • Rhodochrosite on sphalerite 

        Contributor:Raines, Ed; Colorado School of Mines. Geology Museum
        Date:2018
        This mineral specimen is from the Eagle mine in the Gilman mining district, Eagle County, Colorado, and shows intergrowths of pink, flattened (discoidal), rhombohedral crystals of rhodochrosite on black sphalerite crystals.
      • Barite on galena 

        Contributor:Raines, Ed; Colorado School of Mines. Geology Museum
        Date:2018
        Intergrowth of translucent to transparent golden-brown barite crystals with gray cubic crystals of galena from the Eagle mine, Gilman mining district, Eagle County, Colorado.
      • Chalcopyrite 

        Contributor:Raines, Ed; Colorado School of Mines. Geology Museum
        Date:2018
        Plate of intergrown chalcopyrite crystals (many are tarnished to irredescent blues and purples) from the Eagle mine, Gilman mining district, Eagle County, Colorado.
      • Chalcopyrite on pyrite 

        Contributor:Raines, Ed; Colorado School of Mines. Geology Museum
        Date:2018
        Rough, dull golden chalcopyrite crystals on bright brassy pyrite crystals. This mineral specimen is from the Eagle mine, Gilman mining district, Eagle County, Colorado.