18K yellow gold pendant by Roberto Coin featuring a round brilliant cut diamond weighing approx. 0.50 carats with an average color grade of G - H and an average clarity grade of VS, set in four prong tulip setting with signature ruby on back hanging on a 18K yellow gold cable link chain with Roberto Coin signature by lobster clasp, 16 in. L, 3.8 grams

Additional comments added on 1/17/2024: The reverse of the pendant has a custom set round ruby reflecting the same setting of the ruby bear the chain closure and maker's mark. The hidden ruby is the exclusive signature of Roberto Coin Jewelry Unless stated in a laboratory report, gemstone and diamond color, clarity, and carat weight are approximate because stones are mounted at the time of evaluation