18ct White Gold 1.29ct Tanzanite 0.18ct Diamond Three Stone Ring. TVN-127. Our Tanzanite collection showcases one of the world's most desired stones, considered a thousand times rarer than the diamond. This seductive gemstone can exhibit a variety of surreal colours including blues, violets and burgundies so each piece is truly unique and beautiful. This strikingly elegant ring showcases a 1.29ct Tanzanite set onto a beautifully contrasting 18ct white gold band. The ring is further embellished by two dazzling brilliant cut diamonds totalling 0.18ct. At C W Sellors, we have an expert team of gemstone and diamond specialists who handpick and grade each jewel to meet our high standards and a team of talented in house designers who combine their talents to bring you our exclusive Precious Gemstone collection. You can find other Tanzanite pieces online and in store to compliment this ring.