• Chalcopyrite

      Raines, Ed; Mines Museum of Earth Science
      Plate of intergrown chalcopyrite crystals (many are tarnished to irredescent blues and purples) from the Eagle mine, Gilman mining district, Eagle County, Colorado.
    • Sphalerite with minor pyrite

      Raines, Ed; Mines Museum of Earth Science
      Irregular mass of sphalerite crystals (with an iridescent tarnish) and a few scattered pyrite crystals from the Eagle mine, Gilman mining district, Eagle County, Colorado.
    • Chalcopyrite

      Raines, Ed; Mines Museum of Earth Science
      Plate of intergrown, shiny golden yellow chalcopyrite crystals from the Eagle mine, Gilman mining district, Eagle County, Colorado.
    • Tetrahedrite and chalcopyrite with pyrite and dolomite

      Raines, Ed; Mines Museum of Earth Science
      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 mineral specimen is from the Eagle mine, Gilman mining district, Eagle County, Colorado.
    • Pyrite, pseudomorph after marcasite with pyrite and sphalerite

      Raines, Ed; Mines Museum of Earth Science
      Several large clusters of intergrown (former) marcasite crystals that have been replaced by pyrite--on pyrite, on sphalerite.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.
    • Rhodochrosite on sphalerite

      Raines, Ed; Mines Museum of Earth Science
      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

      Raines, Ed; Mines Museum of Earth Science
      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.
    • Siderite on chalcopyrite

      Raines, Ed; Mines Museum of Earth Science
      Complex intergrowths of siderite discs on tarnished chalcopyrite from the Eagle mine, Gilman mining district, Eagle County, Colorado.
    • Pyrite

      Raines, Ed; Mines Museum of Earth Science
      Plate of interlocking pyritohedral crystals of pyrite from the Eagle mine, Gilman mining district, Eagle County, Colorado.
    • Dolomite

      Raines, Ed; Mines Museum of Earth Science
      Large plate of intergrown, pearly, rhombohedral dolomite crystals from the Eagle mine, Gilman mining district, Eagle County, Colorado.
    • Sphalerite

      Raines, Ed; Mines Museum of Earth Science
      Plate of shiny, jet black sphalerite crystals from the Eagle mine, Gilman mining district, Eagle County, Colorado.
    • Pyrite

      Raines, Ed; Mines Museum of Earth Science
      A cluster of pyrite crystals exhibiting the pyritohedral crystal form. Mineral specimen is from the Eagle mine, Gilman mining district, Eagle County, Colorado.
    • Chalcopyrite with minor tetrahedrite-tennantite

      Raines, Ed; Mines Museum of Earth Science
      A large plate of intergrown chalcopyrite crystals with very minor tetrahedrite-tennantite from the Eagle mine, Gilman mining district, Eagle County, Colorado.
    • Calcite stalactite

      Raines, Ed; Mines Museum of Earth Science
      Pearly, off-white stalactite of calcite from the Iron Mask mine, Gilman mining district, Eagle County, Colorado.
    • Pyrite with dolomite

      Raines, Ed; Mines Museum of Earth Science
      Tiny, tarnished pyrite with sphalerite on pearly crystals of dolomite. This mineral specimen is from the Eagle mine, Gilman mining district, Eagle County, Colorado.
    • Barite on galena

      Raines, Ed; Mines Museum of Earth Science
      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.
    • Sphalerite variety schalenblende

      Raines, Ed; Mines Museum of Earth Science
      Plate of interlocking spheres (botyroidal growth) of sphalerite, referred to as "schalenblende", from the Eagle mine, Gilman mining district, Eagle County, Colorado.
    • Pyrite with sphalerite

      Raines, Ed; Mines Museum of Earth Science
      Highly modified pyrite crystals with sphalerite from the Eagle mine, Gilman mining district, Eagle County, Colorado.
    • New Jersey Zinc Co. souvenir ingot

      Raines, Ed; Mines Museum of Earth Science
      Miniature zinc ingot cast by New Jersey Zinc Co., for sale to tourists as a souvenir.
    • Quartz

      Raines, Ed; Mines Museum of Earth Science
      Tapered and etched single quartz crystal from the Eagle mine, Gilman mining district, Eagle County, Colorado.