Item #: 1551841 This is an authentic TIFFANY 18K Yellow Gold Platinum Diamond Schlumberger Sixteen Stone Circle Pendant Necklace. The necklace is crafted of platinum and 18 karat yellow gold and features 16 round brilliant cut diamonds, approximately .57 total carat weight. Follow this item for alerts. Tiffany is a registered trademark of Tiffany. FASHIONPHILE is not affiliated with Tiffany.