1/10 Ctw Round Cut Diamond Halo Semi Mount Engagement Ring in 14K White Gold As a semi-mount diamond engagement ring, this allows you to choose the center stone for it. While the ring comes partly decorated with diamonds, the choice of a center stone is entirely on what you would personally like. You can select a round cut center stone, ranging from 0.20 carat to 0.30 carat. This will be installed on the pronged center, coming up from the gallery, through the centerpiece halo and ending above it. The halo comes pre-embellished with 18 prong set round cut diamonds. Completing the ring is a straight shank. The semi-mount engagement ring is framed in 14 karat white gold. Total diamond weight is 1/10 ctw.