תרשיש , a pellucid gem of a bluish green colour, whence it is called by the lapidaries, aqua marina. Its Hebrew name is a word also for the same reason given to the sea, Psalms 48:7 . It is found in the East Indies, Peru, Siberia, and Tartary. It has a brilliant appearance, and is generally transparent. It was the tenth stone belonging to the high priest's pectoral, Exodus 28:10; Exodus 28:20; Revelation 21:20 .