Lot 1712. 19.00 carats Sri Lankan Sapphire and Diamond Ring. Estimate 680,000 — 880,000 HKD. Photo Sotheby's.

Set with an oval sapphire weighing approximately 19.00 carats, within a pear-shaped diamond surround, weighing approximately 1.60 carats in total, mounted in platinum. Ring size: 5½

Accompanied by AGL report numbered CS 85179, dated 15 March 2016, stating that the sapphire is natural, of Sri Lankan (Ceylon) origin, with no gemological evidence of heat and clarity enhancement. 

Sotheby's. Important Jewels and Jadeite, Hong Kong, 28 Nov 2016, 01:00 PM