This is an authentic TIFFANY 18K Yellow Gold Platinum Diamond XO Brooch Pin. The brooch is crafted of 18 karat yellow gold and features a XO motif with a sparkling diamond encrusted platinum X, approximately .04 total carat weight. This is a beautiful pin with the signature style of Tiffany! Follow this item for alerts. Tiffany is a registered trademark of Tiffany. FASHIONPHILE is not affiliated with Tiffany.