Job 28:17

“The gold and the crystal cannot equal it, etc.] Crystal was found in an island of the Red sea, situated before Arabia, called Neron, and in another, which from a gem found in it bears the name of Topazion, and may be thought therefore to be well known by Job; and though it is not now of so much account, it formerly was very valuable. Pliny f983 makes mention of a crystal vessel, sold for 150,000 sesterces, about 1250 pounds sterling; and of two crystal cups broke by Nero in his fury, on hearing of some losses, to punish the then present age, that no other men might drink out of them: some render it “amber”, which is found in Prussia, and being at a great distance from Job’s country, might be…”

“crystal--Or else glass, if then known, very costly. From a root, "to be transparent." jewels--rather, "vessels."”

“The gold and the crystal - A crystal, in chemistry, is an inorganic body which, by the operation of affinity, has assumed the form of a regular solid, terminated by a number of plane and smooth surfaces. It is round in various forms and sizes, and is composed of a great variety of substances. The common “rock crystal” is a general name for all the transparent crystals of quartz, particularly of limpid or colorless quartz. “Webster.” The word used here (זכוּכית zekûkı̂yth) occurs nowhere else in the Bible. It is from זכה zâkâh, to be clean, pure; and is given to the crystal on account of its transparency. In Arabic the word means either glass or crystal. Jerome translates it, “vitrum” -…”

“crystal: Eze 1:22; Rev 4:6, Rev 21:11, Rev 22:1 jewels: or, vessels Job 28:18”

“17 Gold and glass are not equal to it, Nor is it exchanged for jewels of gold. 18 Pearls and crystal are not to be mentioned, And the acquisition of wisdom is beyond corals. 19 The topaz of Ethiopia is not equal to it, It is not outweighed by pure fine gold. 20 Whence, then, cometh wisdom, And which is the place of understanding? Among the separate חפצים, Pro 3:15, which are here detailed, apart from זהב, glass has the transparent name זכוּכית, or, as it is pointed in Codd., in old editions, and by Kimchi, זכוכית, with Cholem (in the dialects with ג instead of )כ. Symm. indeed translates crystal, and in fact the ancient languages have common names for glass and crystal; but the crystal is…”