18K RUBY RING: 18K yellow gold ring contains 5 round mixed cut rubies. Weight: .50 Ct. Approx. Rated SI in clarity (Type II), stpR in Hue, 4 in Tone and 4 in Saturation. The rubies are prong set. Weight: 6.5 grams. Size: 5.5 Signed: Tiffany & Co.