Authentic Tiffany and Company Platinum Diamond Necklace.  16 inches in length.  Both necklace and pendant are marked 950 pt and Tiffany & Co..  This is the medium size diamond pendant that measures about 22mm in length and is approx 1ct tcw.  It has only been worn a few times and has just been cleaned.  It is in excellent condition (like new).  Shipping and insurance is free.