A sapphire and diamond ring

A 21.07 carats Burmese sapphire and diamond ring. Estimate CHF220,000 – CHF260,000 ($239,016 - $282,474). Photo Christie's Image Ltd 2015.

Set with an oval-shaped sapphire, weighing approximately 21.07 carats, in a pear-shaped sapphire and diamond cluster, to the marquise-cut diamond shoulders, mounted in platinum, ring size 4½ 

Accompanied by report no. 74916 dated 6 June 2014 from the SSEF Swiss Gemmological Institute stating that the sapphire is of Burmese origin, with no indications of heating 

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