Exodus 28:11-14

11With the work of an engraver in stone, like the engravings of a signet, you shall engrave the two stones with the names of the sons of Israel. You shall set them in settings of gold.

12And you shall put the two stones on the shoulders of the ephod as memorial stones for the sons of Israel. So Aaron shall bear their names before the Lord on his two shoulders as a memorial.

13You shall also make settings of gold,

14and you shall make two chains of pure gold like braided cords, and fasten the braided chains to the settings.