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gemology

or gem·mol·o·gy

[je-mol-uh-jee]
noun
  1. the science dealing with natural and artificial gemstones.
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Origin of gemology

First recorded in 1965–70; gem + -o- + -logy
Related formsgem·o·log·i·cal, gem·mo·log·i·cal [jem-uh-loj-i-kuh l] /ˌdʒɛm əˈlɒdʒ ɪ kəl/, adjectivegem·ol·o·gist, gem·mol·o·gist, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for gemology

gemology

gemmology

noun
  1. the branch of mineralogy that is concerned with gems and gemstones
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Derived Formsgemological or gemmological (ˌdʒɛməˈlɒdʒɪkəl), adjectivegemologist or gemmologist, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012