Lot 2038. An important 22.06 carats Type IIa marquise-cut diamond necklace. Estimate HKD 20,000,000 - HKD 30,000,000 (USD 3,500,000-5,000,000). © Christie's Images Ltd 2017

The marquise-cut diamond, weighing approximately 22.06 carats, to the marquise-shaped link necklace, each set with circular-cut diamonds, mounted in platinum and gold, 43.0 cm (length adjustable) 

Accompanied by report no. 2105706754 dated 28 September 2017 from the GIA Gemological Institute of America stating that the diamond is D colour, internally flawless clarity; and a Diamond Type Classification letter stating that the diamond has been determined to be Type IIa