Genesis 2:12 - Clarke's commentary and critical notes on the Bible

And the gold of that land is good: there is bdellium and the onyx stone. There is bdellium (בדלח bedolach) and the onyx stone, אבן השהם eben hashshoham - Bochart thinks that the bedolach or bdellium means the pearl-oyster; and shoham is generally understood to mean the onyx, or species of agate, a precious stone which has its name from ονυξ a man's nail, to the color of which it nearly approaches. It is impossible to say what is the precise meaning of the original words; and at this distance of time and place it is of little consequence.