Useful links:
http://www.opalhorizon.com
http://www.gia.edu/symposium2011
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.
Monday, June 27, 2011
Opal Update
Opal Horizon Ltd, an Australian-based opal mining company has introduced a new comprehensive grading system for natural gem quality precious opals based on three quantifiable grading criteria: category, color and cut. All the best.
Useful links:
http://www.opalhorizon.com
http://www.gia.edu/symposium2011
Useful links:
http://www.opalhorizon.com
http://www.gia.edu/symposium2011
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