1/4 Ctw Round Center Semi-Mount Yellow Swirl Accent Split Shank Diamond Engagement Ring in 14K White and Yellow Gold Beautifully designed, this semi mount engagement ring meets the approval of almost every lady. Adding to its remarkable look is the two-toned split spiral split shank. As a semi mount ring, it allows you to choose the center diamond to your liking. It can be a round diamond ranging from 0.20 carat to 0.30 carat. Embracing the center mount are curved arms of the split shank. These are decorated with 24 prong set round cut diamonds that extend up to the shank. The engagement ring is framed in 14 karat white and yellow gold. Total diamond weight is 1/4 ctw.