18 Karat White Gold, Diamond, & Sapphire Ring Centering a round brilliant diamond weighing a total of 0.39 carats flanked by faceted rectangular-shaped blue sapphires weighing a total of 0.06 carats. The round brilliant diamond has I color, VS2 clarity, fair cut, and no fluorescence. 18k white gold 3 3/4 (size) 0.07 (total weight) Due to the limitations imposed by a mounting, all diamond weights and grades, and gemstone weights are approximate.