A transparent gem, of a colour which seems composed of a strong blue and deep red; and, according as either prevails, affords different tinges of purple, sometimes approaching to violet, and sometimes even fading to a rose colour. The stone called amethyst by the ancients was evidently the same with that now generally known by this name; which is far from being the case with regard to some other gems. The oriental is the hardest, scarcest, and most valuable. It was the ninth stone in the pectoral of the high priest, and is mentioned as the twelfth in the foundations of the New Jerusalem. AMMINADAB, or ABINADAB, a Levite, and an inhabitant of Kirjath-jearim, with whom the ark was deposited after it was brought back from the land of the Philistines, 1 Sam. vii. This Amminadab dwelt in Gibeath, that is to say, in the highest part of the city of Kirjath-jearim. 2. The chariots of Amminadab are mentioned, Canticles vi, 12, as being extremely light. He is thought to have been some celebrated charioteer, whose horses were singularly swift. AMMON, or HAMMON, or JUPITER-AMMON, an epithet given to Jupiter in Lybia, where was a celebrated temple of that deity under the denomination of Jupiter Ammon, which was visited by Alexander the Great. The word _Amoun_, which imports “shining,” according to Jablonski, denoted the effects produced by the sun on attaining the equator, such as the increase of the days; a more splendid light; and, above all, the fortunate presage of the inundation of the Nile, and its consequent abundance.