0.64 ctw Diamond Three-Stone Engagement Ring18K white gold semi mount ring with a 4 prong setting for a 2. 50ct emerald cut center. Accented with 0. 22ctw of prong set round diamonds and 2 prong set emerald cut diamonds totaling 0. 42ctw. In store ring is a sample. Available by special order only. Other metal colors, types, diamond shapes, and sizes are also available by special order. Center sold separately.