A semi-mount diamond engagement ring like this, lets you select a center stone of your choice for it. With this option, you can choose a stone that you like and one that suits your pocket. The engagement ring features an octagonal shape center mount, with the top border in the middle for a center stone of your liking. This is an emerald cut center stone ranging from 0.20 carat to 0.30 carat. Pre-decorated on the mount, in the lower border, is 16 prong set round cut diamonds that halo the center stone. A plain gold straight shank completes the look. The semi-mount engagement ring is carved in 14 karat white gold. Total diamond weight is 1/10 ctw.