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Definition of Sardonyx
1. Noun. An onyx characterized by parallel layers of sard and a different colored mineral. 
Generic synonyms: Onyx
Definition of Sardonyx
1. n. A variety of onyx consisting of sard and white chalcedony in alternate layers.
Definition of Sardonyx
1. a variety of quartz [n -ES]
Medical Definition of Sardonyx
1. 



