Tiffany & Co. Lock Ring in White Gold with Pavé Diamonds The Tiffany & Co. Lock ring is a bold symbol of unity and diversity, celebrating personal connections that shape us. Crafted in 18k white gold with round brilliant diamonds totaling 0.36 carats, this ring is a stylish choice whether worn alone or as part of your everyday ring collection. Details 18k White Gold TTL Carat: 0.36ct Size: 6 Product Number: 72792092