Exodus 39:1-7

Moreover, from the blue and purple and scarlet material, they made finely woven garments for ministering in the holy place as well as the holy garments which were for Aaron, just as the LORD had commanded Moses. He made the ephod of gold, and of blue and purple and scarlet material, and fine twisted linen. Then they hammered out gold sheets and cut them into threads to be woven in with the blue and the purple and the scarlet material, and the fine linen, the work of a skillful workman. They made attaching shoulder pieces for the ephod; it was attached at its two upper ends. The skillfully woven band which was on it was like its workmanship, of the same material: of gold and of blue and purple and scarlet material, and fine twisted linen, just as the LORD had commanded Moses. They 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. And he placed them on the shoulder pieces of the ephod, as memorial stones for the sons of Israel, just as the LORD had commanded Moses.