ὀψιᾰνὸς λίθος,ὁ , a black stone, perh.
A. obsidian, Pliny'sobsiana(neut. pl.), HN 36.196 , cf. Peripl.M.Rubr. 5 , Orph. L. 285 , Cyran. 26 : written ὀψειανόν
PLeid.X. 36
B. ; [ὀψ]ειανόνdub. in Supp.Epigr. 2.776
i 15 (Syria,iii A. D.). (Named from its discoverer Obsius,v.
Plin. l. c.;obsidianaisf.l.ibid.; prob.ᾱby nature.)