18ct White Gold 1.09ct Tanzanite 0.28ct Diamond Twist Ring RW929TZ The Tanzanite collection by Tivon showcases one of the world's most desired stones that is 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 boasts two pear shaped 1.09ct tanzanite stones set onto a beautifully contrasting 18ct white gold band. Surrounding the tanzanite stones are stunning 0.28ct brilliant cut diamonds which add a touch of sparkle to the piece. This glittering dress ring would go perfectly with some of the other Tanzanite jewellery we feature on our website. 18ct White Gold, Tanzanite 1.09ct, Brilliant Cut Diamonds 0.28ct .