Tiffany & Co Platinum & Diamond Cross Pendant & Necklace. The piece is in excellent estate condition and ready to wear. It comes with its original case and box. The piece is signed "Tiffany & Co PT950" on the back of the cross as well as on the chain. The cross is set with approximately .42 carats of diamonds. The chain measures 16.25" long. The cross measures 17mm x 12mm and the entire piece weighs a total of 3.2 grams.