A 24.00 carat Ceylon sapphire and diamond ring, by Gimel. Estimate HK$2,000,000 – HK$3,000,000 (US$250,000-380,000). Photo Christie's Image Ltd 2015

Set with a cushion-shaped sapphire, within a brilliant-cut diamond surround, to the similarly-cut diamond half-hoop, mounted in platinum and 18k yellow gold, ring size 6¼. Signed Gimel

Accompanied by report no. 79647 dated 30 March 2015 from the SSEF Swiss Gemmological Institute stating that the approximately 24.00 carat sapphire is of Ceylon (Sri Lanka) origin, with no indications of heating

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