Lot 1716. An Exquisite Pair of 4.67 and 4.67 carats Burmese Royal Blue Sapphire and 5.01 and 5.01 carats Diamond Pendent Earrings, D Colour, Internally Flawless, Type IIa. Estimate 6,800,000 — 8,500,000 HKD (866,320 — 1,082,900 USD). Lot Sold 8,335,000 HKD (1,063,213 USD). Courtesy Sotheby's.

Accompanied by two Gübelin reports no. 19021114, dated 20 February 2019 and no. 15101143, dated 5 November 2015, stating that the sapphire is of Burmese origin, with no indications of heating. Gübelin further stating that the tradecolour of one of the sapphire is royal blue.

Also accompanied by two GIA reports no. 6305173214, dated 24 August 2018 and no. 2185870053, dated 13 November 2017, stating that the diamond is D Colour, Internally Flawless; further accompanied by two diamond type classification reports stating that the diamonds are determined to be Type IIa. Type IIa diamonds are the most chemically pure type of diamond and often have exceptional optical transparency.

Sotheby's. Magnificent Jewels and Jadeite, Hong Kong, 02 Apr 2019, 02:00 PM