18K CIRCLE BROOCH OF 16.50 CT. TOURMALINE: 18K yellow gold circle shaped brooch contains 11 round mixed cut tourmaline. Weight: 16.50 Ct. Approx. Rated SI in clarity (Type II), BG/GB in Hue, 4 in Tone and 2-3 in Saturation. The tourmaline are prong set. Bar pin closure. Weight: 10.3 grams. 1 /38'' diameter. Est. $550/600**