I.a precious stone, sardonyx; fem., Plin. 37, 6, 23, § 85; Pers. 1, 16; Juv. 7, 144. —Masc., Juv. 6, 382; Mart. 4, 28, 4; 4, 61, 6. —Gen. plur. sardonychum, Juv. 13, 139.— Hence, adj.: sardŏnĭchus , a, um, of sardonyx: “lapis,” Vulg. Job, 28, 16.
sardŏnyx , ychis, m. and f., = σαρδόνυξ,