Antique Edwardian Diamond Gold Heart Pendant on Tiffany & Co Chain Necklace

Edwardian 14k gold heart pendant, adorned with approx. 2.20ctw in diamonds (one tiny stone is missing), suspended on a Tiffany & Co 18k gold chain. Pendant measures 37mm x 32mm. Necklace is 16" long. Weight - 10.6 grams.