Lot 114. An antique 7.77 carats cushion-shaped Burma 'pigeon blood red' ruby and diamond ring. Estimate CHF 300,000 - CHF 500,000 (USD 303,488 - USD 505,814). Photo Christie's Images Ltd 2016.

Set with an antique cushion-shaped ruby, weighing approximately 7.77 carats, between diamond-set shoulders, ring size 6, mounted in platinum.

Accompanied by report no. 86958 dated 18 July 2016 from the SSEF Swiss Gemmological Institute stating that the origin of the ruby is Burma (Myanmar), with no indications of heating, that the colour may also be called 'pigeon blood red'; and an Appendix letter on 'Exceptional ruby'. 

Report no. 0503005 dated 7 March 2005 from the Gübelin GemLab stating that the origin of the ruby is Burma (Myanmar), with no indications of heating.

Please note that report no. 0503005 is over five years old and may require an update. 

Christie's. Geneva Magnificent Jewels, 15 November 2016, Geneva