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Lot 1793. A D Colour, Internally Flawless 8.02 carats Type IIa Diamond Ring. Estimate HK$4,500,000 — 6,000,000 / US$573,300 - 764,400Lot Sold 4,975,000 HKD (634,611 USD). Courtesy Sotheby's.

Set with a pear-shaped diamond weighing 8.02 carats, flanked by tapered baguette diamondssize 5.

Accompanied by GIA report no. 5191068431, dated 17 July 2018, stating that the diamond is D Colour, Internally Flawless; further accompanied by diamond type classification report stating that the diamond is 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