출애굽기 25:7의 타나크

The gold of that land is good. Also found there is bdellium and onyx stones.

They shall make the eiphod out of gold, greenish-blue wool, dark red wool, crimson wool, and fine twined linen, the work of a craftsman.

Take two shoham [onyx] stones and engrave on them the names of the B’nei Yisrael.