Beryl
(tarshish) occurs in (Exodus 28:20) It is generally supposed that the tarshish derives its name from the place so called, in Spain. Beryl is a mineral of great hardness, and, when transparent, of much beauty. By tarshish the modern yellow topaz is probably intended, while in (Revelation 21:20) a different stone is perhaps referred to, probably the mineral now called beryl, which is identical with the emerald except in color, being a light green or bluish-green.