Unparalleled Design -The Winter's howl is housed in a Tungsten-Carbide ring blank, featuring tanzanite and blue opal. A unique faceted pattern is applied to these tungsten rings to create a truly one-of-a-kind ring. Durable and Scratch-ResistantContains real tanzanite and bello opalGlows a bright white in the dark when exposed to UV lightOne Free Size Exchange OfferedLifetime Warranty EligibleHolds a very high polish and luster over time.Comes in 8mm or 6mm width and comfort fitPerfect for every day wear100% hypoallergenicSizing -Making sure your ring fits is a crucial part of the ring shopping process. All Patrick Adair Designs Rings are sized in US sizes. If you are unsure of your ring size, select the "Unsure - Send Ring Sizer First" size option and we will send you a ring sizer before making your ring. This ring is eligible for one free size exchangeLifetime Warranty Policy -All rings are covered under our Lifetime Warranty Policy. If anything happens to your ring, do not hesitate to contact us for a free repair/replacement.Delivery -All our rings are handmade, made to order in America. We are currently averaging 2-3 business days of production time for this ring. If you have a pressing occasion, please contact us and we'll do everything we can to get your ring to you on time.