5 CT. LONDON BLUE TOPAZ WITH DIAMONDS RING: 14K yellow gold ring contains one pear mixed cut blue topaz. Weight: 5.00 Ct. Approx. ''London'' blue in color. 14 round full cut diamonds. Weight: .75 Ct. Approx. Rated VS-SI in clarity and H-I in color. The topaz and diamonds are prong set. Weight: 9.0 grams. Size: 6