This ring is pre-owned. I don't have the original Tiffany certificate anymore. But I had the ring verified for authenticity in Tiffany store Pasadena. It is 100% authentic Tiffany's. The purchase record, diamond information, retail price of this ring are all in Tiffany's system. It was purchased for $19500 plus tax. Price goes up every year. Similar rings currently retail for $21000 to $24000 in Tiffany stores.