A 10.21 carats marquise-cut diamond ring. Estimate HK$4,800,000 – HK$6,800,000 ($600,000-850,000). Photo Christie's Image Ltd 2015

Set with a marquise-cut diamond weighing approximately 10.21 carats, to the brilliant-cut diamond bifurcated half-hoop, mounted in 18k white gold, ring size 5

Accompanied by report no. 7048061 dated 13 June 2008 from the Gemological Institute of America stating that the 10.21 carat diamond is E colour, internally flawless clarity

Please note that the certificate is more than 5 years old and might require an update

Christie's. HONG KONG MAGNIFICENT JEWELS, 2 June 2015, Hong Kong