A stone, ranging in color from blue to pale yellow and found all over the world; three kinds are to be distinguished—beryl, aquamarine, and emerald. According to Ex. xxviii. 20 and xxxix. 13, the beryl was the first on the fourth row of the breastplate of the high priest. It is also mentioned frequently in the apocalyptic literature; e.g., Ezek. i. 16, x. 9, xxviii. 13; Dan. x. 6).