Exodus 28:9-14

9And thou shalt take two onyx stones, and engrave on them the names of the children of Israel: 10Six of their names on one stone, and the six names of the rest on the other stone, according to their birth. 11With the work of an engraver in stone, like the engravings of a signet, shalt thou engrave the two stones with the names of the children of Israel: thou shalt make them to be set in settings of gold. 12And thou shalt put the two stones upon the shoulders of the ephod for stones of memorial to the children of Israel: and Aaron shall bear their names before the LORD upon his two shoulders for a memorial. 13And thou shalt make settings of gold; 14And two chains of pure gold at the ends; of braided work shalt thou make them, and fasten the braided chains to the settings.