1/6 Ctw Round Cut Diamond Semi-Mount Engagement Ring in 14K White Gold A vintage-inspired semi-mount diamond ring, this offers a retro look in a modernistic way. As a semi-mount ring, it lets you choose the center stone ranging from 0.85 carat to 1.20 carat, while the rest of the decoration comes pre-installed. A round cut diamond will need to be selected for the center stone, which will sit in the middle of the mount on raised prongs. Pre-installed on the main mount, encircling the center stone is 22 prong set round cut diamonds. The semi-mount ring is carved in a polished rhodium finish 14 karat white gold. Total diamond weight is 1/6 ctw.