925 sterling silver diamond cut wrapped feather design ring with a gorgeous faceted solitaire round amethyst stone. The stone set in the middle measures 3/16 inch wide by 3/16 inch tall. It is available in sizes 5, 8, and 9. Amethyst is crystalline quartz in colors ranging from pale lilac to deep reddish-purple, with a relatively high hardness of 7. Amethyst is the birthstone for February.