A precious stone said to take its name from the river Achates in Sicily, where it abounded. Agates, which are several kinds, are likewise procured in India, in various parts of Europe, and at the Cape of Good Hope. They are semi-transparent, and often are beautifully veined and clouded, and present in miniature the picture of many natural objects. The agate was the second stone in the third row of the high priest's breastplate, Exodus 28:19; 39:12 .