How do you spell Hannukah?
violet quartz, late 13c., ametist, from Old French ametiste (Modern French améthyste) and directly from Medieval Latin amatistus, from Latin amethystus, from Greek amethystos "amethyst," literally "not intoxicating," from a- "not" + methyskein "make drunk," from methys "wine" (see mead (n.1)); based on the stone's ancient reputation for preventing drunkenness, which was perhaps sympathetic magic suggested by its wine-like color. People wore rings made of it before drinking. Spelling restored from Middle English ametist.
one of the precious stones in the breastplate of the high priest (Ex. 28:19; 39:12), and in the foundation of the New Jerusalem (Rev. 21:20). The ancients thought that this stone had the power of dispelling drunkenness in all who wore or touched it, and hence its Greek name formed from _a_, "privative," and _methuo_, "to get drunk." Its Jewish name, _ahlamah'_, was derived by the rabbins from the Hebrew word _halam_, "to dream," from its supposed power of causing the wearer to dream. It is a pale-blue crystallized quartz, varying to a dark purple blue. It is found in Persia and India, also in different parts of Europe.