Fine sapphire and diamond pendant necklace, Tiffany & Co. Photo: Sotheby's

The pendant suspending on a pear-shaped sapphire weighing 19.03 carats, supported by a circular-cut sapphire weighing 9.89 carats, embellished by old mine-cut diamonds, completed by a gold chain decorated at intervals by old mine-cut diamonds, the diamonds together weighing approximately 20.00 carats, mounted in 18 karat yellow gold, length approximately 350mm,signed. Estimate 6,500,000 — 7,500,000 HKD