Awesome Tiffany & Co. Elsa Peretti "tear drop" 18 K yellow gold 16" necklace is in excellent condition. It is appropriately mark as shown with "Peretti" on one side and "T & Co. 750" on the other side. The clasp has 750 also for 18K. The piece comes with the original case which is also marked "Tiffany & Co." An independent Gemology Institute of America appraiser has valued the necklace at $2,500. Purchaser will receive the appraisal with the necklace.