Exodus 28:19

It shall be square and folded double; a span shall be its length, and a span its width.

You shall set in it settings of stones, four rows of stones: a row of ruby, topaz, and beryl shall be the first row;

and the second row a turquoise, a sapphire, and an emerald;

and the fourth row a chrysolite, an onyx, and a jasper. They shall be enclosed in gold in their settings.

The stones shall be according to the names of the children of Israel, twelve, according to their names; like the engravings of a signet, everyone according to his name, they shall be for the twelve tribes.

You shall make on the breastplate chains like cords, of braided work of pure gold.