John Sinkankas

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Gemstone & mineral data book;: A compilation of data, recipes, formulas, and instructions for the mineralogist, gemologist, lapidary, jeweler, craftsman, and collector
Sinkankas, John

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� 6.18

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Gemstones of North America: 3
Sinkankas, John

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� 6.71

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Gemstones of North America: v. 2
Sinkankas, John

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� 11.99

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Gem Cutting: A Lapidary's Manual, 2nd Edition
Sinkankas, John

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� 16.38

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Field Collecting Gemstones and Minerals
Sinkankas, John

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� 17.96

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Prospecting for Gemstones and Minerals
Sinkankas, John

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� 12.49

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Gem Cutting: A Lapidary's Manual
Sinkankas, John

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� 21.36

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Standard Catalogue of Gem Values
Sinkankas, John

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� 15.48

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