Lot 191. A 18.65 carats Sri Lankan sapphire and diamond ring, by Harry Winston. Estimate £ 60,000 - 80,000 (€ 70,000 - 93,000). © Bonhams 2001-2019. 

Accompanied by a report from AGL stating that the sapphire is of Sri Lankan origin, with no evidence of heat or clarity enhancement. Report number 1099716, dated 19 March 2019.