Tiffany & Co. 18k Gold, Blue, and White Enamel Brooch Attributed to Jean Schlumberger Consign Now DeptJewelrySize1.75 in. x 1.75 in. Tiffany & Co. 18k Gold, Blue, and White Enamel Brooch Attributed to Jean Schlumberger, marked Tiffany & Co. 18k Italy; 35.34g, 22.73dwt. 1.75 in. x 1.75 in. Provenance: The Estate of Carole P. Webster, Nantucket Island, Massachusetts Please note that this auction has ended. Click here for an overview of this auction.