Gateway to Northwestern Ontario Digital Collections

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530
matching items
Geographic Location
Thunder Bay
  
  • Thunder Bay Amethyst Mine
        Stripping the main zone of the mine site to expose mineralization. Mine as it appeared in the late 1960's.
      Stripping the main zone of the mine site to expose mineralization. Mine ...
  • Thunder Bay Amethyst Mine
        Big amethyst crytals O5.
      Big amethyst crytals O5.
  • Thunder Bay Amethyst Mine
        A black and white photo of open pit mining at the Thunder Bay Amethyst Mine in the 1970's
      A black and white photo of open pit mining at the Thunder ...
  • Thunder Bay Amethyst Mine
        A photo of the open pit mine at Thunder Bay Amethyst Mine.
      A photo of the open pit mine at Thunder Bay Amethyst Mine.
  • Amethyst Mine Panorama
        A colour photo of the Thunder Bay Amethyst open pit mine (01)
      A colour photo of the Thunder Bay Amethyst open pit mine (01)
  • Thunder Bay Amethyst Mine
        Variety of: Quartz, SiO2 Uses: Gemstones and ornamental stones Birthstone for: February Color: various shades of purple Index of refraction: 1.544-1.553 Birefringence: 0.009 Hardness: 7 Cleavage: none Crystal system: trigonal Pleochroic: no Amethyst is the purple variety of quartz and is a popular gemstone. If it were not for its ...
      Variety of: Quartz, SiO2 Uses: Gemstones and ornamental stones Birthstone for: February ...
  • Thunder Bay Amethyst Mine
        A vug showing large clay covered amethyst crystals., A vug is another name for geode - a nodular stone having a cavity lined with crystals.
      A vug showing large clay covered amethyst crystals., A vug is another ...
  • Amethyst Mine Panorama
        Photo showing large X1's amethyst crystals.
      Photo showing large X1's amethyst crystals.
  • Amethyst Mine Panorama
        Photo of blasting (O2) in 1972 at the Amethyst Mine Panorama.
      Photo of blasting (O2) in 1972 at the Amethyst Mine Panorama.
  • Amethyst Mine Panorama
        A photo of an open pit mine at Amethyst Mine Panorama
      A photo of an open pit mine at Amethyst Mine Panorama
  • Amethyst Mine Panorama
        Photo of a sample of malachite. August 1985.
      Photo of a sample of malachite. August 1985.
  • Thunder Bay Amethyst Mine
        Large amethyst crystals
      Large amethyst crystals
  • Thunder Bay Amethyst Mine
        Large clay-covered amethyst crystals, August 3,1992.
      Large clay-covered amethyst crystals, August 3,1992.
  • Thunder Bay Amethyst Mine
        Photo showing the site of the main office of the Thunder Bay Amethyst Mine, 1970.
      Photo showing the site of the main office of the Thunder Bay ...
  • Thunder Bay Amethyst Mine
        Shown here is a 1977 photo of an open mining pit at the Thunder Bay Amethyst Mine.
      Shown here is a 1977 photo of an open mining pit at ...
  • Thunder Bay Amethyst Mine
        Shown here is rock being hosed down to clear off the overburden, in preparation for rock sampling.
      Shown here is rock being hosed down to clear off the overburden, ...
  • Thunder Bay Amethyst Mine
        Shown in this photo is open pit benching. Benching of a steep work face consists of narrow horizontal steps across the slope. The rock is exposed and then inspected. Open pit benching is used where slopes are sufficiently steep, water supply is available, and there is room for the dump ...
      Shown in this photo is open pit benching. Benching of a steep ...
  • Thunder Bay Amethyst Mine
        Shown here is one of the open pits of the Thunder Bay Amethyst Mine.
      Shown here is one of the open pits of the Thunder Bay ...
  • Thunder Bay Amethyst Mine
        An aerial view of Thunder Bay Amethyst Mine looking west.
      An aerial view of Thunder Bay Amethyst Mine looking west.
  • Thunder Bay Amethyst Mine
        An aerial view of the Thunder Bay Amethyst Mine looking south, 1985.
      An aerial view of the Thunder Bay Amethyst Mine looking south, 1985.
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