In the fourth row, tarshish, χρυσόλιθος, chrysolite, a brilliant stone of a golden colour, not like what is now called a chrysolite, which is of a pale green with a double refraction; shoham, beryl (see at Gen 2:12); and jaspeh, no doubt the jasper, an opaque stone, for the most part of a dull red, often with cloudy and flame-like shadings, but sometimes yellow, red, brown, or some other colour.
Verse 20
“Gold borders shall be on their settings” (see at Exo 28:11 and Exo 28:13). The golden capsules, in which the stones were “filled,” i.e., set, were to be surrounded by golden ornaments, which not only surrounded and ornamented the stones, but in all probability helped to fix them more firmly and yet more easily upon the woven fabric.
Verse 21
“And the stones shall be according to the names of the sons of Israel, twelve according to their names; seal-engraving according to each one's name shall be for the twelve tribes.” (On אישׁ before על־שׁמו see at Gen 15:10.)
verses 22-25
To bind the choshen to the ephod there were to be two close, corded chains of pure gold, which are described here in precisely the same manner as in Exo 28:14; so that Exo 28:22 is to be regarded as a simple repetition of Exo 28:14, not merely because these chains are only mentioned once in the account of the execution of the work (Exo 39:15), but because, according to Exo 28:25, these chains were to be fastened upon the rosettes notice in Exo 28:14, exactly like those described in Exo 28:13. These chains, which are called cords or strings at Exo 28:24, were to be attached to two golden rings at the two (upper) ends of the choshen, and the two ends of the chains were to be put, i.e., bound firmly to the golden settings of the shoulder-pieces of the ephod (Exo 28:13), upon the front of it (see at Exo 26:9 and Exo 25:37).
Verse 26
Two other golden rings were to be “put at the two ends of the choshen, at its edge, which is on the opposite side (see at Exo 25:37) of the ephod inwards,” i.e., at the two ends or corners of the lower border of the choshen, upon the inner side - the side turned towards the ephod.
verses 27-28
Two golden rings were also to be put “upon the shoulder-pieces of the ephod underneath, toward the fore-part thereof, near the joining above the girdle of it,” and to fasten the choshen from its (lower) rings to the (lower) rings of the ephod with threads of hyacinth, that it might be over the girdle (above it), and not move away (יזּח Niphal of זחח, in Arabic removit), i.e., that it might keep its place above the girdle and against the ephod
