Recent Submissions

  • Silver (sawed) with barite 

    Contributor:Raines, Ed; Colorado School of Mines. Geology Museum
    Date:2017
    A solid mass of native silver from the Bulldog mine, Creede mining district, Colorado.
  • Cerussite 

    Contributor:Raines, Ed; Colorado School of Mines. Geology Museum
    Date:2017
    Intergrowth of white, cyclically twinned crystals from the Bulldog mine, Bulldog vein, Creede mining district, Colorado.
  • Quartz, variety amethyst on barite 

    Contributor:Raines, Ed; Colorado School of Mines. Geology Museum
    Date:2017
    Light purple amethyst crystals covering and replacing barite. Mineral specimen is from the Bulldog mine, Bulldog vein, Creede mining district, Colorado.
  • Chalcopyrite with sphalerite 

    Contributor:Raines, Ed; Colorado School of Mines. Geology Museum
    Date:2017
    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 ...
  • Silver minerals in petrified wood 

    Contributor:Raines, Ed; Colorado School of Mines. Geology Museum
    Date:2017
    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. ...
  • Barite with micro pyromorphite crystals 

    Contributor:Raines, Ed; Colorado School of Mines. Geology Museum
    Date:2017
    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 

    Contributor:Raines, Ed; Colorado School of Mines. Geology Museum
    Date:2017
    Off-white bladed crystals with minor iron oxide staining. Mineral specimen is from the Bulldog mine, Bulldog vein, Creede mining district, Colorado.
  • Pyrite 

    Contributor:Raines, Ed; Colorado School of Mines. Geology Museum
    Date:2017
    Mineral specimen represents one single pyritohedral crystal and is from the Creede mining district, Colorado.
  • Sphalerite stalactites 

    Contributor:Raines, Ed; Colorado School of Mines. Geology Museum
    Date:2017
    Stalactitic growth of sphalerite from the Bulldog mine, Creede mining district, Colorado.
  • Silver 

    Contributor:Raines, Ed; Colorado School of Mines. Geology Museum
    Date:2017
    Branching arborescent growth of silver crystals from the Bulldog mine, Creede mining district, Colorado.
  • Silver (in jar) 

    Contributor:Raines, Ed; Colorado School of Mines. Geology Museum
    Date:2017
    Jar of leaf/spangle silver from the Bulldog mine, Creede mining district, Colorado
  • Silver (wires) 

    Contributor:Raines, Ed; Colorado School of Mines. Geology Museum
    Date:2017
    This mineral specimen is from the Creede mining district, Mineral County, Colorado, and shows a mass of silver wires with quartz.
  • Sphalerite on galena 

    Contributor:Raines, Ed; Colorado School of Mines. Geology Museum
    Date:2017
    Mineral specimen is from the Commodore mine, Amethyst vein system, Creede mining district, Colorado. Some of the sphalerite exhibits twinning according to the spinel law, some of which has a polysynthetic habit.
  • Silver in chalcedony nodule, in banded chalcedony and amethyst (”sowbelly agate”) 

    Contributor:Raines, Ed; Colorado School of Mines. Geology Museum
    Date:2017
    Cut slab polished on both sides ; one of six slices cut from the same piece of “sowbelly”. Mineral specimen is from the Last Chance mine ("Chance cave", 700' level), Amethyst vein, Creede mining district, Colorado.
  • Quartz, variety amethyst with quartz variety chalcedony -- carved sowbelly agate sphere 

    Contributor:Raines, Ed; Colorado School of Mines. Geology Museum
    Date:2017
    Polished sowbelly agate sphere (quartz variety amethyst with quartz variety chalcedony) from the Last Chance mine, amethyst vein, Creede mining district, Colorado.
  • Galena 

    Contributor:Raines, Ed; Colorado School of Mines. Geology Museum
    Date:2017
    Bright gray, partly skeletal crystal from the Bulldog mine, Bulldog vein, Creede mining district, Colorado.
  • Sphalerite with galena, quartz variety amethyst, and minor hematite 

    Contributor:Raines, Ed; Colorado School of Mines. Geology Museum
    Date:2017
    Mineral specimen is from the Commodore mine, Amethyst vein system, Creede mining district, Colorado. Some of the sphalerite exhibits twinning according to the spinel law, some of which has a polysynthetic habit. The ...
  • Quartz, variety amethyst 

    Contributor:Raines, Ed; Colorado School of Mines. Geology Museum
    Date:2017
    Quartz, variety amethyst from the Amethyst vein, Creede mining district, Colorado, forming a vug in amethyst vein material
  • Galena with very thin coating of hematite 

    Contributor:Raines, Ed; Colorado School of Mines. Geology Museum
    Date:2017
    Grey crystals of galena with a thin reddish coating from the Amethyst mine, Amethyst vein, Creede mining district, Colorado.
  • Ktenasite coating chalcopyrite on sphalerite 

    Contributor:Raines, Ed; Colorado School of Mines. Geology Museum
    Date:2017
    Ktenasite is a rare mineral. Some of the sphalerite exhibits twinning according to the spinel law, some of which has a polysynthetic habit. Mineral specimen is from the #5 level tunnel, Commodore mine, Amethyst vein, ...

View more