Antoinette L Matlins PG, is an internationally respected gem and jewellery expert, author, lecturer and popular media guest. Her books are widely used throughout the world by consumers and professionals in the gem and jewellery field alike. Antonio C Bonanno FGA ASA MGA, was one of America's most distinguished gemologists. For over 40 years, he was President of the National Gem Appraising Laboratory, and Director of the Columbia School of Gemology in Silver Spring, Maryland.
"Authoritative and well-organised" - Tundraco's Diamonds, Gemstones, Jewelry, March 2004.
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