Tiffany & Co. Platinum 1.83ct Diamond Pendant Necklace 21''. Set with one pear shaped brilliant cut diamond measuring approx. 11.3x7.61x3.49mm, clarity SI-1 and color E with medium blue U.V. fluorescence. Pendant is marked ''PT. 950'' and chain is marked ''Tiffany & Co. PT 950''. Set weighs 5.27 grams. Comes with current 2025 appraisal from Emerald City Gemological Services.