one of the gems used in the high priest’s breastplate, (Exodus 28:17; 39:10; Ezekiel 28:13) one of the foundations also of the New Jerusalem, in St. John’s description of the city. (Revelation 21:20) The topaz of the ancient Greeks and Romans is generally allowed to be our chrysolite, while their chrysolite is our topaz. Chrysolite is a silicate of magnesia and iron; it is so son as to lose its polish unless carefully used. It varies in color from a pale-green to a bottle-green. It is supposed that its name was derived from Topazos, an island in the Red Sea where these stones were procured.
These files are public domain.
Smith, William, Dr. "Entry for 'Topaz,'". "Smith's Bible Dictionary".