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Gemmologists' Compendium: Seventh Edition

by Robert Webster

ISBN 13: 9780719802911

Format: Illustrated (240 pages)
Publisher: The Crowood Press Ltd
Published: 01 Sep 1998

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Practical Gemmology - A Study of the Identification of Gem-Stones, Pearls and Ornamental Minerals

by Robert Webster

ISBN 13: 9781446522875

Format: Paperback (294 pages)
Publisher: Mcintosh Press
Published: 12 Mar 2014

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