Rating: A. Condition description: Insignificant Traces of Use. This elegant Tiffany & Co. Heart pendant necklace is crafted from 18k rose gold and features a single round brilliant-cut diamond set in a heart-shaped bezel. It hangs from a delicate chain with a lobster clasp. The necklace comes in the signature Tiffany & Co. blue box and papers. Crafted from 18k rose gold . Features a heart. shaped pendant . Set with a single round brilliant. cut diamond . Delicate chain with lobster clasp . Comes in the signature Tiffany & Co. blue box and papers.