15 "You shall make a breastpiece of judgment, in skilled work. In the style of the ephod you shall make it--of gold, blue and purple and scarlet yarns, and fine twined linen shall you make it. 16 It shall be square and doubled, a span[1] its length and a span its breadth. 17 You shall set in it four rows of stones. A row of sardius,[2] topaz, and carbuncle shall be the first row; 18 and the second row an emerald, a sapphire, and a diamond; 19 and the third row a jacinth, an agate, and an amethyst; 20 and the fourth row a beryl, an onyx, and a jasper. They shall be set in gold filigree. 21 There shall be twelve stones with their names according to the names of the sons of Israel. They shall be like signets, each engraved with its name, for the twelve tribes. 22 You shall make for the breastpiece twisted chains like cords, of pure gold. 23 And you shall make for the breastpiece two rings of gold, and put the two rings on the two edges of the breastpiece. 24 And you shall put the two cords of gold in the two rings at the edges of the breastpiece. 25 The two ends of the two cords you shall attach to the two settings of filigree, and so attach it in front to the shoulder pieces of the ephod. 26 You shall make two rings of gold, and put them at the two ends of the breastpiece, on its inside edge next to the ephod. 27 And you shall make two rings of gold, and attach them in front to the lower part of the two shoulder pieces of the ephod, at its seam above the skillfully woven band of the ephod. 28 And they shall bind the breastpiece by its rings to the rings of the ephod with a lace of blue, so that it may lie on the skillfully woven band of the ephod, so that the breastpiece shall not come loose from the ephod. 29 So Aaron shall bear the names of the sons of Israel in the breastpiece of judgment on his heart, when he goes into the Holy Place, to bring them to regular remembrance before the Lord. 30 And in the breastpiece of judgment you shall put the Urim and the Thummim, and they shall be on Aaron's heart, when he goes in before the Lord. Thus Aaron shall bear the judgment of the people of Israel on his heart before the Lord regularly.

Matthew Henry's Commentary on Exodus 28:15-30

Commentary on Exodus 28:15-30

(Read Exodus 28:15-30)

The chief ornament of the high priest, was the breastplate, a rich piece of cloth, curiously worked. The name of each tribe was graven in a precious stone, fixed in the breastplate, to signify how precious, in God's sight, believers are, and how honourable. How small and poor soever the tribe was, it was as a precious stone in the breastplate of the high priest; thus are all the saints dear to Christ, however men esteem them. The high priest had the names of the tribes, both on his shoulders and on his breast, which reminds us of the power and the love with which our Lord Jesus pleads for those that are his. He not only bears them up in his arms with almighty strength, but he carries them in his bosom with tender affection. What comfort is this to us in all our addresses to God! The Urim and Thummim, by which the will of God was made known in doubtful cases, were put in this breastplate. Urim and Thummim signify light and integrity. There are many conjectures what these were; the most probable opinion seems to be, that they were the twelve precious stones in the high priest's breastplate. Now, Christ is our Oracle. By him God, in these last days, makes known himself and his mind to us, Hebrews 1:1,2; John 1:18. He is the true Light, the faithful Witness, the Truth itself, and from him we receive the Spirit of Truth, who leads into all truth.