This gorgeous Amethyst necklace measures 19.5"of a stainless steel chain with a truly outstanding pendant measuring 1.5 x 1 x 0.2. Amethyst is the most highly valued stone in the Quartz group. Amethyst is supposed to be good for insomnia and for people with difficulty of concentration. Besides all these qualities, its purple color is really striking! Due to the nature of natural stones, shapes, sizes and color vary slightly.