Exodus 39:6
“And they wrought onyx stones inclosed in ouches of gold, graven, as signets are graven, with the names of the children of Israel.”
They made shoulderpieces for it, to couple it together: by the two edges was it coupled together.
And the curious girdle of his ephod, that was upon it, was of the same, according to the work thereof; of gold, blue, and purple, and scarlet, and fine twined linen; as the Lord commanded Moses.
And they wrought onyx stones inclosed in ouches of gold, graven, as signets are graven, with the names of the children of Israel.
And he put them on the shoulders of the ephod, that they should be stones for a memorial to the children of Israel; as the Lord commanded Moses.
And he made the breastplate of cunning work, like the work of the ephod; of gold, blue, and purple, and scarlet, and fine twined linen.
Counter-Arguments
The strongest case that this verse does not belong in this theme.

Related Verses
“With the work of an engraver in stone, like the engravings of a signet, shalt thou engrave the two stones with the names of the children of Israel: thou shalt make them to be set in ouches of gold.”
“And thou shalt take two onyx stones, and grave on them the names of the children of Israel:”
“And the stones were according to the names of the children of Israel, twelve, according to their names, like the engravings of a signet, every one with his name, according to the twelve tribes.”
“And the stones shall be with the names of the children of Israel, twelve, according to their names, like the engravings of a signet; every one with his name shall they be according to the twelve tribes.”
“And the fourth row, a beryl, an onyx, and a jasper: they were inclosed in ouches of gold in their inclosings.”