This is an amazing 18k white gold tennis necklace. The necklace is set with sparkling round cut diamonds that weigh 30.87cttw. The 19 large diamonds are GIA certified that weigh 18.81ct. The rest of the small diamond weighs 12.06ct. The color of the diamonds is E-H with VS1-I1 clarity. The necklace measures 17 inches in length and has a tapering width from 3mm to 7mm. The necklace is stamped 18K and weighs 38.1 grams.