Amethyst, the birthstone of February, is a variety of Quartz that carries a spectacular purple color that ranges from a blend of deep violet and red to a lighter lilac hue. Ancient Greeks believed that the stone protected the wearer from drunkenness and enabled them to keep a balanced mindset. The ancient Greeks and Romans believed Amethyst would ward off the intoxicating powers of Bacchus, and keep the wearer clear headed and quick-witted.