10K White Gold .12cttw Bead Set Round Station Diamond Stackable Ring. The perfect April birthstone ring, mothers ring, wedding band or stackable ring, this 10 karat white gold band has a classic bead set style with round stations with .12cttw of round diamonds and polished 10K white gold going 1/3rd around the ring. All birthstone rings and mother's rings are available in all birthstones. Looks great worn alone, or as a stackable ring. Also available in rose and yellow gold.