Rocks, Gems, and Minerals > Gemstones

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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.
GemSite - Coloured gemstone information resource created by the International Coloured Gemstone Association.
Gemstones: An Overview of Production of Specific U.S. Gemstones - U.S. Bureau of Mines Special Publication.
Gemstones: The Flowers of the Mineral Kingdom - Lists of some of the gem kingdom's more prized and recognised members by their chemical makeup.
Mineral and Gemstone Kingdom - Information and images of minerals, including a special gemstone section.
Natural Gemstones - Terminology, chemical formulas, collectors' information, and more from the USGS.

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