Centring an antique cushion-shaped sapphire, weighing 8.53 carats, within a pear and brilliant-cut diamond surround of bombé design, diamonds approximately 6.50 carats total, signed Boucheron Paris, ring size 6 

Accompanied by a SSEF report stating that the natural sapphire is of 'Royal Blue' colour, has no indications of thermal treatment and originates from Burma (Myanmar). Report number 82978, dated 12 November 2015. 

Bonhams. RARE JEWELS & JADEITE, 30 Nov 2016, 15:00 HKT - HONG KONG, ADMIRALTY