Exodus 39:3-7

3Then they hammered out gold sheets and cut them into threads 1to be woven in with the violet, the purple, and the scarlet material, and the fine linen, the work of a skilled embroiderer. 4They made attaching shoulder pieces for 2the ephod; it was attached at its two upper ends. 5And the skillfully woven band of its overlay which was on it was like its workmanship, 3of the same material: of gold and of violet, purple, and scarlet material, and fine twisted linen, just as the Lord had commanded Moses.

64They also made the onyx stones, set in gold filigree settings; they were engraved like the engravings of a signet, according to the names of the sons of Israel. 7And 5he placed them on the shoulder pieces of the ephod as memorial stones for the sons of Israel, just as the Lord had commanded Moses.