Exodus 39:6-8

New International Version - UK

⁶ They mounted the onyx stones in gold filigree settings and engraved them like a seal with the names of the sons of Israel. ⁷ Then they fastened them on the shoulder pieces of the ephod as memorial stones for the sons of Israel, as the Lord commanded Moses.

The breastpiece

⁸ They fashioned the breastpiece – the work of a skilled craftsman. They made it like the ephod: of gold, and of blue, purple and scarlet yarn, and of finely twisted linen.