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https://www.gia.edu/gems-gemology/spring-2019-gemnews-boulder-opal-mining-with-rod-griffin
https://opalicon.com
P.J.Joseph's Weblog On Colored Stones, Diamonds, Gem Identification, Synthetics, Treatments, Imitations, Pearls, Organic Gems, Gem And Jewelry Enterprises, Gem Markets, Watches, Gem History, Books, Comics, Cryptocurrency, Designs, Films, Flowers, Wine, Tea, Coffee, Chocolate, Graphic Novels, New Business Models, Technology, Artificial Intelligence, Robotics, Energy, Education, Environment, Music, Art, Commodities, Travel, Photography, Antiques, Random Thoughts, and Things He Like.
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Tuesday, September 17, 2019
Boulder Opal Mining With Rod Griffin
Labels:
Duncan Pay,
Erin Hogarth,
Gems & Gemology,
GIA,
opal,
Rod Griffin
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