Exodus 39:3-7

3And they did beat the gold into thin plates, and cut it into wires, to work it in the blue, and in the purple, and in the scarlet, and in the fine linen, with cunning work. 4They made shoulderpieces for it, to couple it together: by the two edges was it coupled together. 5And the curious girdle of his ephod, that was upon it, was of the same, according to the work thereof; of gold, blue, and purple, and scarlet, and fine twined linen; as Yhwh commanded Moses.

6And they wrought onyx stones inclosed in ouches of gold, graven, as signets are graven, with the names of the children of Israel. 7And he put them on the shoulders of the ephod, that they should be stones for a memorial to the children of Israel; as Yhwh commanded Moses.