one who deals in stones and gems, a lapidary (see Molina)
Alonso de Molina:
chalchiuhiximatqui. lapidario. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 19r. col. 1. Thanks to Joe Campbell for providing the transcription.