Exodus 28:11

“With the work of an engraver in stone, etc.] Not in common but precious stones: Moses was not to do this himself, as it could not be supposed he should, but he was to employ an engraver, whose business it was, and one that was capable of doing it in a professional manner: [like] the engravings of a signet shall thou engrave the two stones with the names of the children of Israel: as in signets or seals, by which impressions are made on wax, the letters or figures are cut deep, that they might on the wax stand out; so it seems the letters of the names of the children of Israel were cut in these stones: this shows that engraving on precious stones is very old, and the ancients indeed are said…”

“(Compare Exodus 39:1-31.) Moses is now commanded to commit all that pertains to the offerings made to the Lord in the sanctuary to the exclusive charge of the members of a single family, who were to hold their office from generation to generation. In the patriarchal times, the external rites of worship had generally been conducted by the head of the tribe or family, in accordance with the principle involved in the dedication of the firstborn Exodus 13:2; Numbers 3:12-13. Moses, as the divinely-appointed and acknowledged leader of the nation, had, on a special occasion, appointed those who were to offer sacrifice, and had himself sprinkled the consecrating blood of the victims on the people…”

“Ouches - Hollow places, such as are made in gold rings, to receive and hold the precious stones. Exodus 28:15”

“engravings of a signet: Exo 28:21, Exo 28:36; Jer 22:24; Zac 3:9; Eph 1:13, Eph 4:30; Ti2 2:19; Rev 7:2 ouches of gold: Exo 28:13, Exo 28:14, Exo 28:25, Exo 39:6, Exo 39:13, Exo 39:18 Exodus 28:12”