18K White & Yellow Gold Tanzanite & Diamond Ring

18 karat white and yellow gold Tanzanite and diamond ring. Set in the center of this ring is one emerald cut Tanzanite, weighing 2.56ct, fine purple color. This stone is set in a four prong setting, and is surrounded by a halo of round full-cut natural diamonds. The diamonds continue onto the shank and the undercarriage, with a total carat weight of 0.93ctw. 7.0 grams.