Shop for Lava And Amethyst Healing Yoga Bracelet today. Amethyst is a violet variety of quartz. The ancient Greeks wore amethyst and carved drinking vessels from it in the belief that it would prevent intoxication. Amethyst is a semiprecious stone often used in jewelry and is the traditional birthstone for February. Place an order at Natural Agate for this amazing Lava And Amethyst Healing Yoga Bracelet. These bracelets use stones with particular energy properties to subtly change the wearer's life and health.