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      Material World: The Six Raw Materials That Shape Modern Civilization by Conway, Ed
      Material World: The Six Raw Materials That Shape Modern Civilization -- Ed Conway - Hardcover
      $35.00 $24.98
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      Rocks & Minerals of Washington and Oregon: A Field Guide to the Evergreen and Beaver States by Lynch, Dan R.
      Rocks & Minerals of Washington and Oregon: A Field Guide to the Evergreen and Beaver States -- Dan R. Lynch - Paperback
      $14.95 $10.98
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      The Minerals Encyclopedia: 700 Minerals, Gems and Rocks by Hochleitner, Rupert
      The Minerals Encyclopedia: 700 Minerals, Gems and Rocks -- Rupert Hochleitner - Paperback
      $29.95 $20.98