amethyst
in heraldry, signifies a purple color. It is the same, in a nobelman’s escutcheon, as purpure, ina gentleman’s and mercury, in that of a prince.
[L. amethystus; Gr. which the Greeks supposed to be formed from a neg. and to inebriate, from some supposed quality in the stone of resisting intoxication. Plin. 37.9, mentions an opinion that it takes its name from its color approaching that of wine, but not reaching it.]