Exodus 28:9-12

9“You are to take two onyx stones and engrave on them the names of the sons of Israel,

10six of their names on one stone, and the six remaining names on the second stone, according to the order of their birth.

11You are to engrave the two stones with the names of the sons of Israel with the work of an engraver in stone, like the engravings of a seal; you are to have them set in gold filigree settings.

12You are to put the two stones on the shoulders of the ephod, stones of memorial for the sons of Israel, and Aaron will bear their names before the Lord on his two shoulders for a memorial.