Gemmology

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Who Is Who
The Gübelin Academy: Accessible lessons in gemmology
Apr 16, 2019
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Books
Book Review: 'Secrets of the Gem Trade’ by Richard W. Wise
Sep 20, 2018
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Coloured Gems
Four Important Colombian Emeralds
May 25, 2014
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Coloured Gems
Colombian Emeralds: A Benchmark For Emerald’s Beauty
May 22, 2014
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Diamonds
The Chameleon Diamond – A Mystery of Nature
Apr 28, 2014