Gemstones Formed in Pegmatites: Gem Pegmatites of Minas Gerais, Brazil

  • Peter C. Keller


Of all the rock types encountered on Earth, none is more gemologically important for its variety and quantity of gemstones than the igneous bodies known as pegmatites. More gemstones are found in pegmatites than in any other type of deposit. Pegmatites yield huge quantities of tourmaline, beryl (aquamarine and morganite), chrysoberyl, kunzite, and topaz, as well as a host of much rarer gems and minerals. Important descriptions of pegmatites are found in Sinkankas (1981) and Schneiderhohn (1961).


Natural History Museum Rare Element Granitic Magma Lateritic Soil Granitic Pegmatite 
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Copyright information

© Van Nostrand Reinhold 1990

Authors and Affiliations

  • Peter C. Keller
    • 1
  1. 1.Natural History Museum of Los Angeles CountyUSA

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