This is an authentic TIFFANY 18K Yellow Gold Platinum Diamond Blue Sapphire Schlumberger Sixteen Stone Ring size 49 or 5. The ring is crafted of 18 karat yellow gold and platinum, and features a X motif band set with blue sapphire and diamonds, approximately .59 total carat weight. PLEASE NOTE: The ring has sizing beads. Follow this item for alerts. Tiffany is a registered trademark of Tiffany. FASHIONPHILE is not affiliated with Tiffany.