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Home Library Index The basics Nomenclature Science Gemmology Occurences Valuation People Famous Opal LiteratureCoursesDiscussion About About Acknowledgements Ask Tony
Opal Academy

The Story of European Precious opal from Dubnik

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by Peter Semrad

Published: 1st January 2011

You can buy a copy here.

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OccurrencesAnthony SmallwoodOctober 28, 2020
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