18 Karat gold, platinum, sapphire and diamond 'Morning Glory' necklace, Schlumberger for Tiffany & Co. Photo Sotheby's. The front suspending five fanciful flowerheads set with numerous round sapphires, spaced by sculpted flower buds, set with round diamonds...

18 Karat gold, platinum, amethyst, emerald and diamond 'Vigne' necklace, Schlumberger for Tiffany & Co. Photo Sotheby's. The entwined meandering vines of graduated design, suspending 11 oval-shaped amethysts measuring approximately 26.1 by 21.0 mm to...

18 Karat gold, platinum and diamond 'Tulip' necklace, Schlumberger for Tiffany & Co. Photo Sotheby's. The articulated clusters of textured gold tulips, decorated with diamond-set insects, leaves and gold bows, set with round and pear-shaped diamonds weighing...