An important sapphire and diamond necklace, by Bulgari. Photo Christie's Image Ltd 2014

The front designed as a fringe of cabochon sapphires, each within a brilliant and baguette-cut diamond surround or border, to the neckchain of alternating brilliant-cut diamond trefoils and baguette-cut diamonds, to a cabochon sapphire clasp, mounted in platinum and 18k white gold , 36.5 cm long, in navy blue leather Bulgari case. Signed Bulgari. Estimate HK$1,600,000 – HK$2,500,000 ($207,380 - $324,031)

Accompanied by report no. 73694 dated 27 March 2014 from the SSEF Swiss Gemmological Institute stating that the sapphires weighing approximately 150.00 carat total are of Burma (Myanmar) origin, with no indications of heating.

Christie's. HONG KONG MAGNIFICENT JEWELS, 27 May 2014, Convention Hall - http://www.christies.com/