18ct White Gold 0.93ct Tanzanite 0.17ct Diamond Halo Ring RW-0928-TZ This elegant 18 carat white gold ring features a central brilliant cut 0.93 carat Tanzanite, surrounded by pave set 0.17 carat white diamonds which continue down the shoulders of the ring. Materials: 18ct White Gold, Tanzanite 0.93ct, Diamonds 0.17ct