18ct White Gold 3.49ct Tanzanite Diamond Oval Cut Trilogy Ring, RUNQ0000859. This exquisite 18ct white gold ring features a stunning oval cut 3.49ct tanzanite gemstone which is adorned either side by two brilliant cut diamonds, totalling 0.70cts. Designed perfectly for everyday wear, this gemstone set ring would make the perfect engagement or dress ring.  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 and diamond pieces online and in store to complement this ring. All articles purchased from C W Sellors are lovingly and securely dispatched with our elegant jewellery packaging.