Amethyst Ring. This handmade ring features a 7mm x 5mm AA Grade Amethyst stone, bezel mounted E-W on a 6.4mm wide 925 Sterling Silver Flower and Wave pattern band. Average rings are 2 to 2.5mm wide. With wider bands such as this it is generally advised to increase the ring size by 1 size. Oxidized to a Vintage Silver finish. Ring sizer included. Shipped in gift box. Amethyst, a purple form of Quartz is the birthstone for February.