The gold and the crystal cannot equal it: and the exchange of it shall not be for jewels of fine gold.
All Commentaries on Job 28:17 Go To Job 28
George Leo Haydock
AD 1849
Gold. This is the third time it has been mentioned, according to its different degrees of excellence. Hence it is called by the most common name, (Calmet) zahab. (Haydock)
Crystal was formerly more "transparent "than we have it at present. (Calmet)
Zecucith (Haydock) denotes something of this kind. (Calmet)