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  • GemSite
    Colored gemstone information resource created by the International Colored Gemstone Association.
    www.gemstone.org/index_gemsite.html
  • Gemstones: The Flowers of the Mineral Kingdom
    Lists of some of the gem kingdom's more prized and recognized members by their chemical makeup.
    mineral.galleries.com/minerals/gemstone/class.htm
  • Natural Gemstones
    Terminology, chemical formulas, collectors' information, and more from the USGS.
    pubs.usgs.gov/gip/gemstones
  • Gemstones: An Overview of Production of Specific U.S. Gemstones
    U.S. Bureau of Mines Special Publication.
    minerals.usgs.gov/minerals/pubs/commodity/gemstones/sp14-95
  • Gem of a Story, A
    Explore the Hall of Geology, Gems, and Minerals at the National Museum of Natural History, and browse through an extensive gem and mineral image database.
    www.bsu.edu/eft/gems
  • Mineral and Gemstone Kingdom
    Information and images of minerals, including a special gemstone section.
    www.minerals.net
 



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