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Jade • A Gemologist's Guide
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Ruby & Sapphire Buying Guide
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Jade • A Gemologist's Guide
Dominic Mok • Richard Hughes |
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RUBY & SAPPHIRE • A Gemologist's Guide
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Ruby & Sapphire: A Gemologist's Guide
by Richard W. Hughes |
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The Heat Treatment of Ruby & Sapphire
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Gem Reference Book Understanding Value
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Total : 10 ( Page(s) : 1 )
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