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GIA: Gemological Institude of America
Worldwide headquarter for gems and jewelry education
www.gia.edu
Diamond Trading Company, for information on diamonds
www.dtc.com
American Gem Society, for information on colored stones
www.americangemsociety.com
Kitco, for information on precious metals:
Gold, Platinum and Silver
www.kitco.com
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At Harry's Fine Jewelers, we value knowledge about jewelry.To help you make the best choice, please see:
