Platinum, 18ct gold and diamond 'Sixteen Stone' ring, Jean Schlumberger for Tiffany & Co., designed as a continuous series of eight pairs of round brilliant-cut diamonds alternating between X-shaped motifs, the diamonds together weighing approximately 1.14 carats, size G1/2, signed Tiffany & Co., Schlumberger. Accompanied by a Tiffany & Co. Box.