And thou shalt take two onyx stones, and grave on them the names of the children of Israel:

'And thou hast taken the two shoham stones, and hast opened on them the names of the sons of Israel;

You are to take two beryl stones, on which the names of the children of Israel are to be cut:

Accipies quoque duos lapides onychinos, et sculpes in eis nomina filiorum Israel.

And thou shalt take two onyx-stones. That the connection between the priest and the people might be made more plain, God not only placed on his breast the memorials of the twelve tribes, but also engraved their names on his shoulders. Thus all occasion of envy was removed, since the people would understand that this one man was not separated from the others for the sake of private advantage, but that in his one person they were all a kingdom of priests, which Peter teaches to have been at length really fulfilled in Christ, (1-Peter 2:5;) as Isaiah had foretold that there should be priests of God, and Levites brought from the Gentiles, (Isaiah 66:21;) to which John makes allusion in the Apocalypse, where he says that we are all priests in Christ, (Revelation 1:6.) But we must remember the reason why our High Priest is said to bear us on His shoulders, for we not only crawl on earth, but we are plunged in the lowest depths of death; how then should we be able to ascend to heaven, unless the Son of God should raise us up with Him; Now, since there is no ability in us unto eternal life, but all our powers of mind and body lie prostrate, we must be borne up by His strength alone. Hence then arises our confidence of ascending to heaven, because Christ raises us up with Him; as Paul says, we "sit together in heavenly places in Christ Jesus," (Ephesians 2:6;) however weak then we may be in ourselves, herein is all our strength, that we are His burden. Therefore in this old type was prefigured what Paul teaches, that the Church is "his body," and "the fullness of him," (Ephesians 1:22.) It remains that each of us, conscious of our own weakness, should rest on Christ; for when in foolish arrogance we exalt ourselves, we do not suffer ourselves to be lifted up by Him, to be borne and sustained by His power. Let the proud then, by lifting themselves on high, fall down in ruin, whilst Christ supports us upon His shoulders. These stones are called "stones of memorial;" and again, "for a memorial" to the children of Israel; as is also afterwards repeated of the twelve stones; which some expound, that "God may be mindful of the children of Israel;" others, that "the priest himself may remember them;" others, that "the children of Israel may remember that God is reconciled to them for the sake of the one Mediator;" but I simply interpret it, that they were a monument of the mutual agreement between God and them; as if God would shew by a visible sign that He embraced them and received them into His sanctuary, as often as they were offered in this manner.

Two onyx stones - See Clarke on Exodus 25:7 (note).

And thou shall take two onyx stones,.... called from the colour of a man's nail, which they to resemble: the Targums of Onkelos and Jonathan call them stones of beryl, and so the Syriac version; the Septuagint, stones of emerald, and the Arabic version, crystal stones: but, according to Josephus (x), they were sardonyx stones, and in which Brannius (y) thinks he was right:
and grave on them the names of the children of Israel; the names of the twelve sons of Jacob, six on one stone and six on the other, as often mentioned, for which onyx stones are very fit; and they must be very large to have so many letters graved upon them; for there is no reason to believe the initial letters of their names only were engraved, but their whole names at length. In the Museum at Dresden is an oriental onyx which cost 48,000 dollars; it is of an oval figure, and its longest diameter is almost six inches, and in such an one might easily be engraved so many names: and Wagenseil makes mention of one in the possession of the bishop of Bamberg, in which were represented Christ sitting, and teaching his twelve apostles standing round him, of which he has given the figure (z): the onyx stone being of the colour observed, was a fit emblem of Christ in his human nature, and if the sardonyx, of him in both his natures; and as the twelve tribes of Israel were a figure of the church, their names being on two stones may denote both the Jewish and Gentile churches; these being precious stones on which they were engraven, may signify how valuable the church and its members are to Christ; and being alike there, their being equally loved of God, chosen in Christ, redeemed by his blood, interested in all the blessings of his grace, and shall enjoy the same glory; and their names being there, the distinct knowledge had of them by name, and being in ouches of gold, their dignity and safety, as afterwards declared.
(x) Ut supra. (Antiqu. l. 3. c. 7. sect. 5.) (y) De Vestitu Sacerd. Hebrews. l. 2. c. 18. sect. 4. p. 730. (z) Not. in Misn. Sotah, c. 9. p. 996.