Sar"do*nyx (?), n. [L., fr. Gr. &?;. See
Sard, and Onyx.] (Min.) A variety of onyx
consisting of sard and white chalcedony in alternate layers.
Sar"do*nyx (?), n. [L., fr. Gr. &?;. See
Sard, and Onyx.] (Min.) A variety of onyx
consisting of sard and white chalcedony in alternate layers.