"Authentic" Tiffany & Co. Elsa Peretti D Heart Necklace

"Authentic" Tiffany & Co. Elsa Peretti Open Double Heart Lariat Sterling Silver Necklace. It comes with box, pouch, and silver cloth. I don't know what I did with receipt? It was purchased City Centre/Square One mall inside Holt Renfrew I'm in their computer system as this is not my first pc from this location. The last picture was screen shot to show current retail price of $1,250. I'm asking $600 cash .. Happy to answer any questions. Only serious inquiries please!!