• Dolomite 

        Author(s):Raines, Ed; Mines Museum of Earth Science
        Date:2018
        Format:born digital; digital photographs
        Large plate of intergrown, pearly, rhombohedral dolomite crystals from the Eagle mine, Gilman mining district, Eagle County, Colorado.
      • Siderite on chalcopyrite 

        Author(s):Raines, Ed; Mines Museum of Earth Science
        Date:2018
        Format:born digital; digital photographs
        Complex intergrowths of siderite discs on tarnished chalcopyrite from the Eagle mine, Gilman mining district, Eagle County, Colorado.
      • Galena, sphalerite, and dolomite/ankerite and minor pyrite 

        Author(s):Raines, Ed; Mines Museum of Earth Science
        Date:2018
        Format:born digital; digital photographs
        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 ...
      • Quartz 

        Author(s):Raines, Ed; Mines Museum of Earth Science
        Date:2018
        Format:born digital; digital photographs
        Plate of quartz crystals from the Ground Hog mine, Gilman mining district, Eagle County, Colorado.
      • Chalcopyrite with minor tetrahedrite-tennantite 

        Author(s):Raines, Ed; Mines Museum of Earth Science
        Date:2018
        Format:born digital; digital photographs
        A large plate of intergrown chalcopyrite crystals with very minor tetrahedrite-tennantite from the Eagle mine, Gilman mining district, Eagle County, Colorado.
      • Fluorapatite, chalcopyrite, and sphalerite on pyrite 

        Author(s):Raines, Ed; Mines Museum of Earth Science
        Date:2018
        Format:born digital; digital photographs
        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.
      • Pyrite 

        Author(s):Raines, Ed; Mines Museum of Earth Science
        Date:2018
        Format:born digital; digital photographs
        A cluster of pyrite crystals exhibiting the pyritohedral crystal form. Mineral specimen is from the Eagle mine, Gilman mining district, Eagle County, Colorado.
      • Pyrite 

        Author(s):Raines, Ed; Mines Museum of Earth Science
        Date:2018
        Format:born digital; digital photographs
        Intergrowth of bright shiny, striated cubes of pyrite from the Eagle mine, Gilman mining district, Eagle County, Colorado.
      • Rhodochrosite on sphalerite 

        Author(s):Raines, Ed; Mines Museum of Earth Science
        Date:2018
        Format:born digital; digital photographs
        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.
      • Siderite 

        Author(s):Raines, Ed; Mines Museum of Earth Science
        Date:2018
        Format:born digital; digital photographs
        A large plate of interlocking, flattened (disc-shaped) rhombohedral, tan siderite crystals from the Eagle mine, Gilman mining district, Eagle County, Colorado.
      • Pyrite, pseudomorph after marcasite with pyrite and sphalerite 

        Author(s):Raines, Ed; Mines Museum of Earth Science
        Date:2018
        Format:born digital; digital photographs
        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.
      • Chalcopyrite 

        Author(s):Raines, Ed; Mines Museum of Earth Science
        Date:2018
        Format:born digital; digital photographs
        Plate of intergrown chalcopyrite crystals (many are tarnished to irredescent blues and purples) from the Eagle mine, Gilman mining district, Eagle County, Colorado.
      • Tetrahedrite and chalcopyrite with pyrite and dolomite 

        Author(s):Raines, Ed; Mines Museum of Earth Science
        Date:2018
        Format:born digital; digital photographs
        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. This ...
      • Barite on galena 

        Author(s):Raines, Ed; Mines Museum of Earth Science
        Date:2018
        Format:born digital; digital photographs
        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.
      • Barite 

        Author(s):Raines, Ed; Mines Museum of Earth Science
        Date:2018
        Format:born digital; digital photographs
        Intergrowth of translucent to transparent golden-brown barite crystals on matrix from the Rocky Point claim, Eagle mine, Gilman mining district, Eagle County, Colorado.
      • Sphalerite 

        Author(s):Raines, Ed; Mines Museum of Earth Science
        Date:2018
        Format:born digital; digital photographs
        Plate of shiny, jet black sphalerite crystals from the Eagle mine, Gilman mining district, Eagle County, Colorado.
      • Barite 

        Author(s):Raines, Ed; Mines Museum of Earth Science
        Date:2018
        Format:born digital; digital photographs
        Mineral specimen is from the Rocky Point claim, Eagle mine, Gilman mining district, Eagle County, Colorado, and shows intergrown translucent to transparent golden-brown crystals completely covering the specimen matrix.
      • Rhodochrosite 

        Author(s):Raines, Ed; Mines Museum of Earth Science
        Date:2018
        Format:born digital; digital photographs
        A large mass of intergrown pink, disc-shaped, flattened rhombohedral crystals from the Eagle mine, Gilman mining district, Eagle County, Colorado.
      • Pyrite 

        Author(s):Raines, Ed; Mines Museum of Earth Science
        Date:2018
        Format:born digital; digital photographs
        Plate of interlocking pyritohedral crystals of pyrite from the Eagle mine, Gilman mining district, Eagle County, Colorado.
      • Pyrite pseudomorphs after marcasite with minor sphalerite and galena overgrowths 

        Author(s):Raines, Ed; Mines Museum of Earth Science
        Date:2018
        Format:born digital; digital photographs
        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, Eagle ...