These natural, semi-precious Amethyst Stone plugs are just gorgeous! The birthstone for February, Amethyst is a powerful healing stone. It is said to relieve stress and irritability, balance mood swings and dispel anger, fear and anxiety. It is also thought to relieve insomnia, headaches and tension whilst enhancing memory. PLEASE NOTE: As this is a natural product. Individual plugs will vary in appearance as a consequence. Also, while quite strong, it may break or chip if it is dropped.