Bead Set Contoured Diamond Ring .12 Cttw 10K White Gold10K White Gold . 12cttw Bead Set Contoured Diamond Stackable Ring. The perfect April birthstone ring, mothers ring, wedding band or stackable ring, this 10 karat white gold band has . 12cttw of bead set round diamonds and polished 10K white gold going 1 3rd around the ring. One side of the ring is contoured to wrap around the round diamonds and the other is flat to fit flush against another ring. All birthstone rings and mother's rings are available