Stones rings are made of HiMacs®, mimicking granite so realistically, it brings an aesthetics which is quite uncommon to jewellery. Basic shapes bring forward the texture and color. HiMacs® also enables the rings to be durable and easy to maintain. Free Shipping for all worlwide customers Check out with Paypal Select ring size to continue. The sizes use US/Canada system and represent inside diameter of 16mm (5.5), 17mm (6.5) and 18mm (7.5).