18K DIAMOND & ONYX BROOCH: 18K yellow gold hammered geometric design brooch contains 15 round brilliant cut diamonds. WEIGHT: .75 Ct. Approx. Rated VS in clarity and G-H in color. The diamonds are pave set. Geometric shaped carved onyx. Bar pin closure. Signed: KEIL. Weight: 28.1 grams. Length: 2.25''