Exodus 39:7-10
English Standard Version
8He made the breastpiece, in skilled work, in the style of the ephod, of gold, blue and purple and scarlet yarns, and fine twined linen.
9It was square. They made the breastpiece doubled, a span its length and a span its breadth when doubled.
10And they set in it four rows of stones. A row of sardius, topaz, and carbuncle was the first row;