God's people are called his jewels. Malachi 3:17. And agreeably to this, the new Jerusalem is thus described, Revelation 21:19-21.
Related Commentaries of Exodus 28:15
Exodus 28:15-20
15 And thou shalt make the breastplate of judgment with cunning work; after the work of the ephod thou shalt make it; of gold, of blue, and of purple, and of scarlet, and of fine twined linen, shalt thou make it.
16 Foursquare it shall be being doubled; a span shall be the length thereof, and a span shall be the breadth thereof.
17 And thou shalt seta 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.
18 And the second row shall be an emerald, a sapphire, and a diamond.
19 And the third row a ligure, an agate, and an amethyst.
20 And the fourth row a beryl, and an onyx, and a jasper: they shall be set in gold in their inclosings.b