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PubTalk 12/2008 — Gemstone Deposits of the United States

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Detailed Description

Commercial production - localities visited by mineral collectors

by Pete Modreski, USGS Gemstone Specialist


  • Gemstones found in the United States include sapphire, opal, tourmaline, aquamarine, turquoise, amethyst, peridot, and many others
  • More than a half-dozen states are known for their gemstones, including unusual and exotic varieties such as red beryl, benitoite, and sunstone
  • The gem material produced in the U.S. having the greatest overall value, does NOT come from rocks . what is this valuable commodity?
  • In how many states have diamonds have been found; which states have produced diamonds commercially?




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