Lot 2062. Important 28.39 carats Burmese 'royal blue' Sapphire and Diamond Ring. Estimate: HK$8,000,000.00 - HK$12,000,000.00 (US$1,000,000-1,500,000). © Christie's Images Ltd

Oval-shaped sapphire of 28.39 carats, shield-shaped and circular-cut diamonds, gold, ring size 6 

SSEF, 2018, Premium report no. 97708: 28.396 carats, Burma, no indications of heating, 'royal blue', Appendix Letter 
Gübelin, 2017, report no. 17117104 and Gemmological Profile: 28.39 carats, Burma, no indications of heating, 'royal blue', Appendix letter. 

Christie's. Hong Kong Magnificent Jewels, Hong Kong, 27 november 2018