1/2 ctw Marquise and Round Cut Diamond Semi-Mount Engagement Ring in 14K Yellow and White Gold A distinctive design and the freedom to select a center stone that suits your budget, draw instant attention to this semi-mount diamond engagement ring. While the shank comes pre-decorated, the prong-raised 14 karat white gold center mount is left empty for a stone of your choice. This must be a round cut diamond ranging from 0.85 ctw to 1.20 ctw. The shank features a channel-like groove running through the middle, where 4 each, total 8 on either side, prong set marquise cut diamonds are embellished. A prong set round cut diamond each is seen on the center front and back of the gallery. The semi-mount diamond engagement ring is carved in 14 karat yellow and white gold. Total diamond weight is 1/2 ctw.