1/3 Ctw Circular Shape Tri Mount Round Cut Diamond Semi-Mount Engagement Ring in 14K White and Yellow GoldA classy Semi Mount diamond engagement ring, this lets you pick a budget friendly center stone for it. The ring features a tri mount center, with a triangular mount flanking a circular center mount. You need to choose a 6. 5MM round cut center stone, ranging 0. 85 Ctw to 1. 20 Ctw for the center mount. Pre embellished are 3 each, total 6, prong set round cut diamonds on the triangular mounts, and 6 each, total 12, prong set round cut diamonds on