Lot 134. A 43.60 carats "Royal Blue" Sri Lankan sapphire and diamond necklace, Cartier. Estimate: HK$3,500,000 - 5,500,000 (US$450,000 - 705,000). Sold for HK$4,560,000. © Tiancheng International.

The articulated necklace to the front set with a heart-shaped sapphire weighing 43.60 carats, decorated with pear-shaped and brilliant-cut diamonds together weighing approximately 56.70 carats, mounted in 18 karat white gold, signed and numbered 610 023, length approximately 420mm.