Exodus 39:2-7

²He made the ephod of gold, blue, purple, scarlet, and fine twined linen. ³They beat the gold into thin plates, and cut it into wires, to work it in the blue, in the purple, in the scarlet, and in the fine linen, the work of the skillful workman. ⁴They made shoulder-pieces for it, joined together. At the two ends it was joined together. ⁵The skillfully woven band that was on it, with which to fasten it on, was of the same piece, like its work; of gold, of blue, purple, scarlet, and fine twined linen; as Yahweh commanded Moses.

⁶They worked the onyx stones, enclosed in settings of gold, engraved with the engravings of a signet, according to the names of the children of Israel. ⁷He put them on the shoulder-pieces of the ephod, to be stones of memorial for the children of Israel, as Yahweh commanded Moses.