Exodus 28:17

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.

Ver. 17. Four rows of stones.] According to the number and order of the twelve tribes encamping about God's tabernacle. In all which rows, a very reverend writer a hath well observed eight things: - (1.) The shining of the stones; pointing to the purity of Christ and his Church: (2.) Their price; of great value and worth; signifying what a price Christ valued his Church at: (3.) Their place or situation; they are set in the heart, and Aaron must carry them on his heart, signifying that Christ hath as much care of his Church, as if it were enclosed in his heart, - lets out his blood to make room in his heart for them: (4.) Their number; twelve; noting, that with Christ is plentiful redemption: (5.) Their order; they stood in a comely quadrangle; Christ hath stablished a comely order in his Church; and we must keep our ranks: (6.) The figure; the four square; signifying the stability and firmness of the Church; Satan and all deceivers shall not pick one stone out of Christ's heart: (7.) Their use; that Aaron must bear them on his heart; signifying Christ's ardent affection to his, and constant intercession for them: (8.) The quantity; as all the names of Israel were gathered into a narrow compass, so Christ shall "gather together into one all the dispersed sons of God," and present them before God as the most beautiful and precious parts of the world. Joh 11:52

a Dr Taylor.