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 1.33 carats, size Q12/58, signed Tiffany & Co., Schlumberger Studios. Accompanied by a Tiffany & Co. Receipt and box.