The square step-cut sapphire, weighing 4.21 carats, within a surround of old brilliant-cut diamonds, to finely detailed shoulders and an engraved hoop ring size 5¼

Accompanied by a SSEF report stating that the natural sapphire has no indications of heat treatment and originates from Kashmir. Report number 77725, dated 12 December 2014. 

Accompanied by a Gubelin report stating that the natural sapphire has no indications of heat treatment and originates from Kashmir. Report number 16020189, dated 1 March 2016.

Bonhams. RARE JEWELS & JADEITE, 31 May 2017, 15:00 HKT, HONG KONG, ADMIRALTY