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chaton

noun
cha·​ton | \(ˈ)sha¦tōⁿ\
plural chatons\ -​ōⁿ(z) \

Definition of chaton 

1 : the head of a ring in which a stone is set or on which a device is engraved

2 : the stone set in a chaton

3 or chaton foil : a coating (as a foil or lacquer) applied to the back of a cheap gemstone to give it greater brilliancy

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History and Etymology for chaton

French, from Old French chastun, of Germanic origin; akin to Old High German kasto container, Middle Dutch kaste barn, Old English bēocere beekeeper, Old High German kar vessel, Old Norse ker, Gothic kas

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