Natural Tanzanite Lab Diamond Silver RingMetal Silver Product Weight 1. 57 Gms Gemstone Natural Tanzanite Diamond Lab Grown Diamond Total Gemstone Weight (Average) 0. 25 Carat Total Diamond Weight (Average) 0. 18 Carat Gemstone Shape Round Diamond Shape Round Gemstone Size (Average) 4. 00 mm Diamond Size (Average) 1. 30 mm, 0. 90 mm Gemstone Color Blue Diamond Color EF Diamond Clarity VVS VS No. of Gemstones 1 No. of Diamonds 28 Gemstone Setting Prong Diamond Setting Prong A luminous