Lewis Short
(adjective) : gemmārĭus, a, um, gemma
* Of or pertaining to gems: ars,Vulg. Exod. 39, 6 and 29.—Hence, subst.: gemmārĭus, ii, m., a jeweller, Inscr. Orell. 4302; cf. ib. 2661; Inscr. Murat. 941, 2; Vulg. Exod. 28, 11.
Charlton T. Lewis, Charles Short, A Latin Dictionary