"You shall set in it four rows of stones. A row of carnelian, chrysolite, and emerald shall be the first row; and the second row a turquoise, a sapphire and a moonstone; and the third row a jacinth, an agate, and an amethyst; and the fourth row a beryl, an onyx, and a jasper; they shall be set in gold filigree. There shall be twelve stones with names corresponding to the names of the sons of Israel; they shall be like signets, each engraved with its name, for the twelve tribes. You shall make for the breastpiece chains of pure gold, twisted like cords; and you shall make for the breastpiece two rings of gold, and put the two rings on the two edges of the breastpiece." (NRSV 28:17-23)
And thou shalt set in it settings of stones, even four rows of stones: the first row shall be a sardius, a topaz, and a carbuncle: this shall be the first row. And the second row shall be an emerald, a sapphire, and a diamond. And the third row a ligure, an agate, and an amethyst.
And the fourth row a beryl, and an onyx, and a jasper: they shall be set in gold in their inclosings. And the stones shall be with the names of the children of Israel, twelve, according to their names, like the engravings of a signet; every one with his name shall they be according to the twelve tribes. And thou shalt make upon the breastplate chains at the ends of wreathen work of pure gold. And thou shalt make upon the breastplate two rings of gold, and shalt put the two rings on the two ends of the breastplate. (KJV 28:17-23)
Call this passage the "Golden Shopping List." Where is your average Israelite going to get all of this stuff? Truth is, he can't. This passage was written by people who had access to all of these materials; and it was written for men who knew how to mold the gold. We're talking a definite urban setting.
Pairing monetary goods like these with religious power is the ultimate endorsement. This mix of religious and economic power is crucial in understanding where these texts come from in the early-civ web.