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chalcedonyx

noun
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chal·​ce·​don·​yx | \ ˌkalsəˈdäniks, kalˈsedᵊniks \
plural -es

Definition of chalcedonyx

: 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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History and Etymology for chalcedonyx

chalcedony + onyx

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“Chalcedonyx.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/chalcedonyx. Accessed 4 Mar. 2021.

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