Stuart Robertson was spot on. The biggest problem today is correctly identifying treated from non-treated gemstones and it is becoming nearly impossible with the best gem testing equipment available, period. Sad really.
Useful links:
http://www.gemguide.com
http://www.agta.org
http://gemstone.org
http://www.palagems.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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