Royal Purple. The name Amethyst comes from the Ancient Greek ἀ a- ("not") and μέθυστος methustos ("intoxicated"), a reference to the belief that the stone protected its owner from drunkenness; the ancient Greeks and Romans wore amethyst and made drinking vessels of it in the belief that it would prevent intoxication.
Amethyst can naturally turn to Citrine in the earth, with time and changes in the earth's temperature. When it has partially changed, the stone is called Ametrine. It is much more rare than either amethyst or citrine.
