Genuine amethyst & diamond French-set halo necklace. There is one 7x5 emerald step cut natural amethyst and 14 round diamonds that are 0.20 ct tw, SI1-2 in clarity and G-H in color. The pendant dimension is 11x8.8 mm in size and hangs on an 18" inch necklace. Available in white, yellow, and rose gold; as well as platinum. Amethyst is the birthstone of February. Amethyst encourages the wearer humility and wisdom. It was also believed those wearing amethyst would keep their mind clear.