Boyd’s Bible Dictionary:

Concise Bible Dictionary:

The precious stone in each shoulder piece of the ephod, and one of those in the breastplate of the high priest. Its Hebrew name is shoham; but this has five different translations in the LXX, and its identity is uncertain (Gen. 2:1212And the gold of that land is good: there is bdellium and the onyx stone. (Genesis 2:12); Ex. 25:77Onyx stones, and stones to be set in the ephod, and in the breastplate. (Exodus 25:7); Ex. 28:9,209And thou shalt take two onyx stones, and grave on them the names of the children of Israel: (Exodus 28:9)
20And the fourth row a beryl, and an onyx, and a jasper: they shall be set in gold in their inclosings. (Exodus 28:20)
; Ex. 35:9,279And onyx stones, and stones to be set for the ephod, and for the breastplate. (Exodus 35:9)
27And the rulers brought onyx stones, and stones to be set, for the ephod, and for the breastplate; (Exodus 35:27)
; Ex. 39:6,136And they wrought onyx stones inclosed in ouches of gold, graven, as signets are graven, with the names of the children of Israel. (Exodus 39:6)
13And the fourth row, a beryl, an onyx, and a jasper: they were inclosed in ouches of gold in their inclosings. (Exodus 39:13)
; 1 Chron. 29:22Now I have prepared with all my might for the house of my God the gold for things to be made of gold, and the silver for things of silver, and the brass for things of brass, the iron for things of iron, and wood for things of wood; onyx stones, and stones to be set, glistering stones, and of divers colors, and all manner of precious stones, and marble stones in abundance. (1 Chronicles 29:2); Job 28:1616It cannot be valued with the gold of Ophir, with the precious onyx, or the sapphire. (Job 28:16); Ezek. 28:1313Thou hast been in Eden the garden of God; every precious stone was thy covering, the sardius, topaz, and the diamond, the beryl, the onyx, and the jasper, the sapphire, the emerald, and the carbuncle, and gold: the workmanship of thy tabrets and of thy pipes was prepared in thee in the day that thou wast created. (Ezekiel 28:13)).

Strong’s Dictionary of Hebrew Words:

from an unused root probably mean to blanch; a gem, probably the beryl (from its pale green color)
KJV Usage:

Jackson’s Dictionary of Scripture Proper Names:

setting them equal: justifying them