Beryl. Beryl, (Hebrew, 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.