TIFFANY & CO OPEN HEART PLATINUM DIAMOND KEY PENDANT. The item "Tiffany & Co Open Heart 1.25 CTW Diamond Platinum Key Pendant Necklace" is in sale since Wednesday, February 5, 2020. This item is in the category "Jewelry & Watches\Fine Jewelry\Fine Necklaces & Pendants\Diamond". The seller is "ajlikeswatches" and is located in New York, New York. This item can be shipped worldwide.