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1:11:32
YouTube
Gem-A
Gem-A Live: Understanding Gemstone Species and Varieties
What makes an emerald an emerald and not an aquamarine? Gem-A tutor, Lily Faber FGA DGA, presents this webinar on gemstone species and varieties, providing an overview of the well-known groups beryl, corundum, garnet and quartz. This webinar also covers: - Chemical Composition - Inclusions - Causes of Colour - Optical Effects This webinar was ...
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