Estate Tiffany & Co. Diamond Necklace in Platinum Topped 18K Yellow Gold. The necklace features 15ctw of brilliant round diamonds, E-F color, VVS clarity. Modern piece that is rare and collectible due to the process of how it is crafted. The necklace has a layered technique of rolling platinum over yellow gold, a costly and lengthy process. Normal retail is approximately $95,000- $100,000. 16.75" Length 96 Grams 1/5" Wide