1/2 Ctw Semi-Mount Round Cut Diamond Engagement Ring in 14K White GoldIf you wish to have a center stone in a weight of your choice put in, a Semi Mount ring like this should be your ideal buy. For this ring, you can choose a round cut diamond ranging from 0. 50 carat to 0. 70 carat and decide what weight diamond you want set in. What also makes this ring a good choice, is that it comes preset with smaller round cut diamonds that embellish the shank. There is a total of 14 split prong set round cut diamonds decorating