Amethyst gemstones are eye-catching violet stones with hues ranging from light pink to a deep, rich purple. Amethyst gemstones have been treasured throughout history. The Greeks believed that amethyst could ward off intoxication, while medieval soldiers wore amethyst amulets to protect themselves in battle. Royals have prized amethyst as well. After all, purple is a royal color. Amethyst gemstones are among the British Crown Jewels and were also a favorite of Catherine the Great and Egyptian royalty. As the birthstone of February, amethyst jewelry is commonly given to commemorate a February birth.