- 1(less frequent gemstone NAmE//ˈdʒemstoʊn//) a precious stone that has been cut and polished and is used in jewelry synonym jewel, precious stone a crown studded with gems
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- 2a person, place, or thing that is especially good This picture is the gem (= the best) of the collection. a gem of a place She's a real gem! compare jewel
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