1.00 Carat (ctw) Sterling Silver Oval Blue Tanzanite Ladies Wedding Ring Anniversary Band 1 CT Crafted in 925 Sterling-silver Gemstone : Tanzanite Gemstone Color / Clarity : Blue / Moderately Included Gemstone Weight : 1.00 ct tw.. Weighs approximately 1.21 grams Dazzlingrock 90 Day Warranty - We stand behind our products. If you lose an accent stone or your setting is damaged during NORMAL wear, we will fix it for FREE. Please read our About us page for more info