Exodus 28:13-17

And you shall make filigree settings of gold,

and two chains of pure gold; you shall make them of twisted cord work, and you shall put the corded chains on the filigree settings.

“You shall make a breastpiece of judgment, the work of a skilled embroiderer; like the work of the ephod you shall make it: of gold, of violet, purple, and scarlet material, and fine twisted linen you shall make it.

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

And you shall mount on it four rows of stones; the first row shall be a row of ruby, topaz, and emerald;