πυρίτης

A. of or in fire, π. τὴν τέχνην, i.e. a smith, Luc. JConf. 8, cf. Sacr. 6.

II. π. λίθος, a mineral which strikes fire, copper pyrites, Dsc. 5.125, Plin. HN 36.138; other varieties of uncertain nature, ib.137, PHolm. 11.38, Zos.Alch.p.120B., al., Suid. s.v. ἄφαντον φῶς; of a zinc ore, Dsc. 5.74.