Now showing items 41-60 of 72

    • Chalcopyrite on pyrite

      Raines, Ed; Mines Museum of Earth Science
      Rough, dull golden chalcopyrite crystals on bright brassy pyrite crystals. This mineral specimen is from the Eagle mine, Gilman mining district, Eagle County, Colorado.
    • Quartz

      Raines, Ed; Mines Museum of Earth Science
      Plate of quartz crystals from the Ground Hog 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.
    • 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.
    • Siderite

      Raines, Ed; Mines Museum of Earth Science
      A large plate of interlocking, flattened (disc-shaped) rhombohedral, tan siderite crystals from the Eagle mine, Gilman mining district, Eagle County, Colorado.
    • Barite

      Raines, Ed; Mines Museum of Earth Science
      Intergrowth of translucent to transparent golden-brown barite crystals on matrix from the Rocky Point claim, 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.
    • Rhodochrosite with pyrite

      Raines, Ed; Mines Museum of Earth Science
      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, Gilman mining district, Eagle County, Colorado.
    • Silver (sawed) with barite

      Raines, Ed; Mines Museum of Earth Science
      A solid mass of native silver from the Bulldog mine, Creede mining district, Colorado.
    • Chalcopyrite with sphalerite

      Raines, Ed; Mines Museum of Earth Science
      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 the Creede mining district, Colorado.
    • Quartz, variety amethyst on barite

      Raines, Ed; Mines Museum of Earth Science
      Light purple amethyst crystals covering and replacing barite. Mineral specimen is from the Bulldog mine, Bulldog vein, Creede mining district, Colorado.
    • Pyrite

      Raines, Ed; Mines Museum of Earth Science
      Mineral specimen represents one single pyritohedral crystal and is from the Creede mining district, Colorado.
    • Cerussite

      Raines, Ed; Mines Museum of Earth Science
      Intergrowth of white, cyclically twinned crystals from the Bulldog mine, Bulldog vein, Creede mining district, Colorado.
    • Silver minerals in petrified wood

      Raines, Ed; Mines Museum of Earth Science
      Mineral specimen is from the Monkeymeyer mine, Creede mining district, Colorado. Petrified wood found in the Monkeymeyer sandstone unit of the Creede formation contained sufficient silver mineralization to be ore. Mr. Monkeymeyer operated a small mine and the sandstone unit was named for him.
    • Barite with micro pyromorphite crystals

      Raines, Ed; Mines Museum of Earth Science
      Intergrowth of colorless blades of barite with a few scattered microcrystals of pyromorphite. Mineral specimen is from Bulldog mine, Bulldog vein, Creede mining district, Colorado.
    • Barite with quartz

      Raines, Ed; Mines Museum of Earth Science
      Off-white bladed crystals with minor iron oxide staining. Mineral specimen is from the Bulldog mine, Bulldog vein, Creede mining district, Colorado.
    • Sphalerite stalactites

      Raines, Ed; Mines Museum of Earth Science
      Stalactitic growth of sphalerite from the Bulldog mine, Creede mining district, Colorado.
    • Silver (in jar)

      Raines, Ed; Mines Museum of Earth Science
      Jar of leaf/spangle silver from the Bulldog mine, Creede mining district, Colorado.
    • Silver

      Raines, Ed; Mines Museum of Earth Science
      Branching arborescent growth of silver crystals from the Bulldog mine, Creede mining district, Colorado.
    • Silver (wires)

      Raines, Ed; Mines Museum of Earth Science
      This mineral specimen is from the Creede mining district, Mineral County, Colorado, and shows a mass of silver wires with quartz.