Lot 1637. Fine pair of 9.10 and 8.56 carats "Royal Blue" Burmese sapphire and diamond earrings. Estimate 1,500,000 — 1,800,000 HKD. Lot sold 1,820,000 HKD. Photo: Sotheby's 2011.

Each centring on an oval sapphire weighing 9.10 and 8.56 carats respectively, surrounded by marquise- and pear-shaped diamonds altogether weighing approximately 5.70 carats, mounted in 18 karat white gold.

companied by GRS report numbered GRS2010-122198, dated 23 December 2010, stating that the 9.10 and 8.56 carat sapphires are natural, Vivid Blue colour (GRS type "Royal Blue" colour), of Burmese (Myanmar) origin, with no indication of thermal treatment.