14K MEXICAN OPAL & DIAMOND RING: 14K yellow gold ring contains 1 oval Mexican opal WEIGHT: 2.00 Ct. Approx. 16 round single cut diamonds. WEIGHT: .10 Ct. Approx. Rated SI in clarity and H-I in color. The opal and diamonds are prong set. Weight: 3.3 grams. Size: 8.25