Lot 1998. A highly important art deco ruby and diamond necklace, by Cartier. Estimate HK$6,000,000 – HK$8,000,000 ($500,000-750,000). Price realised HKD 14,440,000. © Christie's Image Ltd 2015

The front section designed as a series of old European and single-cut diamond concave plaques, each set to the centre with three cushion, oval or circular-cut rubies, flanked by shield, square and keystone-cut diamonds and baguette-cut diamonds to the sides, the edges further embellished by a line of cabochon rubies, alternating with calibré-cut ruby hoops, linked by baguette-cut diamonds with ruby bead accents, extending to the back section with alternate single-cut diamond bombé panels with cabochon ruby detail, mounted in platinum, 40.3 cm long. Signed Cartier 

Accompanied by report no. 78158 dated 29 January 2015 from the SSEF Swiss Gemmological Institute stating that the rubies weighing approximately 50.00 carats total, fourteen are of Burma (Myanmar) origin, with no indications of heating and one is of Siam (Thailand) origin, with indications of heating 

CHRISTIE'S. HONG KONG MAGNIFICENT JEWELS, 2 June 2015, Hong Kong