1/6 Ctw Oval Shape Round Cut Diamond Semi-Mount Engagement Ring in 14K White Gold A semi-mount ring is good for you, if you wish to have a smaller or a larger weight center stone for it, to suit your pocket. This semi-mount diamond ring is designed for this very purpose. It features an oval shape centerpiece and a plain white gold shank. The center mount offers an oval middle mount that will hold the center stone of your choice ranging from 0.85 carat to 1.20 carat, which as per its design should be an oval cut diamond. 22 prong set round cut diamonds come pre-installed on the centerpiece. These diamonds border the center stone, forming a halo around it. The semi-mount ring is carved in 14 karat white gold. Total diamond weight is 1/6 ctw.