Exodus 28:6-10

“And they shall make the ephod of gold, of blue and purple and scarlet yarns, and of fine twined linen, skillfully worked. It shall have two shoulder pieces attached to its two edges, so that it may be joined together. And the skillfully woven band on it shall be made like it and be of one piece with it, of gold, blue and purple and scarlet yarns, and fine twined linen. You shall take two onyx stones, and engrave on them the names of the sons of Israel, six of their names on the one stone, and the names of the remaining six on the other stone, in the order of their birth.