18K Yellow Gold /950 Platinum. Your happiness is our priority and we strive to provide you with the best quality products and service.The item "Tiffany & Co Vintage 18K & PLAT 1.1 ct Three Stone Round Diamond Engagement Ring" is in sale since Tuesday, April 17, 2018. This item is in the category "Jewelry & Watches\Engagement & Wedding\Engagement Rings\Diamond". The seller is "exquisitejwlr" and is located in Palatine, Illinois. This item can be shipped worldwide.