This Tanzanite halo ring is made of 18k white gold and weighs 4.2 DWT (approx. 6.53 grams). It contains one round tanzanite weighing 1.70 CTTW, 20 round G color, VS clarity diamonds weighing 0.30 CTTW, 14 trapezoid G color, and VS clarity diamonds weighing 0.87 CTTW.