14K SEMI-CRYSTAL OPAL & DIAMOND RING: 14K yellow gold ring contains 18 navette shaped 4.00 x 2.20 mm cabochon cut semi-crystal opals. Weight: 2.00 Ct. Approx. Grey body-color, blue/green/violet/orange play-of-color. In the center are 4 round single cut diamonds. Weight: .06 Ct. Approx. The diamonds average SI in clarity and H-I in color. The opals and diamonds are prong set. Weight: 4.7 grams. Size: 7