Glass

Was well known to the ancients, and no doubt to the Jews; its invention is traced to an incident on the coast to Phoenica, and the arts of blowing, coloring, and cutting it were familiar to the ancient Egyptians. The "looking glasses" of the Jews, however, were of highly polished metal, usually small and round, Ex 38:8Job 37:18Jas 1:23. Glass does not appear to have been used at that time for mirrors, nor for windows; but for cups, bottles, vases, ornaments, sacred emblems, etc. It is alluded to in 1Co 13:12Re 4:6 15:2 21:18,21; probably also in Job 28:17, where our English version has the word crystal.