Exodus 39:8-14

He made the breastpiece, the work of a skillful workman, like the workmanship of the ephod: of gold and of blue and purple and scarlet material and fine twisted linen. It was square; they made the breastpiece folded double, a span long and a span wide when folded double. And they mounted four rows of stones on it. The first row was a row of ruby, topaz, and emerald; and the second row, a turquoise, a sapphire and a diamond; and the third row, a jacinth, an agate, and an amethyst; and the fourth row, a beryl, an onyx, and a jasper. They were set in gold filigree settings when they were mounted. The stones were corresponding to the names of the sons of Israel; they were twelve, corresponding to their names, engraved with the engravings of a signet, each with its name for the twelve tribes.