Exodus 39:9 (KJV)

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.

And they set in it four rows of stones: the first row was a sardius, a topaz, and a carbuncle: this was the first row.

And the second row, an emerald, a sapphire, and a diamond.

And the third row, a ligure, an agate, and an amethyst.

And the fourth row, a beryl, an onyx, and a jasper: they were inclosed in ouches of gold in their inclosings.

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.