Lot 88. A 4.77 carats Burma  'pigeon blood red' cushion-shaped ruby and diamond ring. Estimate CHF300,000 – CHF500,000 ($316,344 - $527,240). Photo Christie's Image Ltd 2016

Set with a cushion-shaped ruby, weighing approximately 4.77 carats, within a heart-shaped and marquise-cut diamond surround, to the pavé-set diamond shoulders, ring size 6 ½, mounted in gold

Accompanied by report no. 83428 dated 14 December 2015 from the SSEF Swiss Gemmological Institute stating that the origin of the ruby is Burma (Myanmar), with no indications of heating, and that the colour may also be called 'pigeon blood red'.

Christie's. GENEVA MAGNIFICENT JEWELS, 18 May 2016, Geneva