1/3 Ctw Tri Mount Emerald Shape Round Cut Diamond Semi-Mount Engagement Ring in 14K White and Yellow GoldIf you are looking for a partly customized ring, this Semi Mount diamond engagement ring would be a good choice. It lets you choose the main stone, while the rest of the ring comes pre decorated. It features a prong raised center, with a triangular mount each flanking the center. An Emerald cut center stone in the range of 0. 85 Ctw to 1. 20 Ctw can be selected for the prong raised center. On the flanking triangular mounts are seen 3 each prong set