A practising gemologist with special skills.
Useful link:
https://www.gia.edu/gems-gemology/spring-2019-gemnews-derek-katzenbach
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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Showing posts with label Derek Katzenbach. Show all posts
Showing posts with label Derek Katzenbach. Show all posts
Friday, July 26, 2019
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