Lot 317. An impressive 30.20 carats Burmese ruby and diamond ring. Estimate CHF3,200,000 – CHF4,200,000 ($3,365,631 - $4,417,391). Price realised CHF 3,189,000. © Christie's Image Ltd 2015

Set with a cushion-shaped ruby, weighing approximately 30.20 carats, to the pear-shaped diamond shoulders, mounted in platinum, ring size 4½ 

Accompanied by report no. 11060059 dated 09 June 2011 from the Gübelin GemLab stating that the ruby is of Burmese origin, with indications of heating and a Note on Burmese rubies 

Christie's. GENEVA MAGNIFICENT JEWELS, 13 May 2015, Geneva