Exodus 28:6-10

and they shall make the ephod of gold, blue, purple, and scarlet thread, and fine woven linen, artistically worked. It shall have two shoulder straps joined at its two edges, and so it shall be joined together. And the intricately woven band of the ephod, which is on it, shall be of the same workmanship, made of gold, blue, purple, and scarlet thread, and fine woven linen. “Then you shall take two onyx stones and engrave on them the names of the sons of Israel: six of their names on one stone and six names on the other stone, in order of their birth.