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chalcedonyx

noun chal·ce·don·yx \ ˌkalsəˈdäniks , kalˈsedᵊniks \

Definition of chalcedonyx

plural -es
:a mineral that consists of onyx in which the bands are white to gray and that is valued as a semiprecious stone

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Origin and Etymology of chalcedonyx

chalcedony + onyx

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