This halo style engagement ring is made of 18k white gold and weighs 2.7 DWT. It contains one GIA certified asscher I SI1 clarity diamond weighing 1.41 CT, 32 princess F-G color, diamonds weighing 0.43 CTTW, 80 round F-G color, and diamonds weighing 0.55 CTTW. Approximately 4.2 grams