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Cally Oldershaw is a gemologist and science educator. She is the author of several very widely held books about gems. Oldershaw is Liaison Officer for the Geological Society of London and an examiner for the Gemmological Association of Great Britain.〔(WorldCat Identities )〕 ==Bibliography== * ''Gems of the World''. (in 442 WorldCat libraries)〔Oldershaw, Cally. Gems of the World. Richmond Hill, Ont: Firefly Books, 2008. ISBN 978-1-55407-367-2 (WorldCat )〕 *''Firefly guide to gems'' in 686 libraries according to Worldcat〔Oldershaw, Cally. Firefly Guide to Gems. Toronto, Ont: Firefly Books, 2003. ISBN ( http://www.worldcat.org/title/firefly-guide-to-gems/oclc/51292154&referer=brief_resultsWorldCat )〕 *''Gemstones'' (published in association with the Natural History Museum).〔Oldershaw, Cally, Christine Woodward, and Roger Harding. Gemstones. New York, N.Y.: Sterling Pub. Co, 2001.ISBN 9781402724060 ()〕 *''Atlas of geology and landforms'' and ''Rocks and minerals close up'' (elementary and junior high school textbooks) She also wrote the multiple parts of the Geological society of London series of booklets, ''Earth in our hands'',〔()〕 and many parts of the ''Series: 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Cally Oldershaw」の詳細全文を読む スポンサード リンク
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