Lot 1752. 5.22 carats Fancy intense blue diamond and diamond ring, mount by Cartier. Estimate: HK$25,000,000 - 30,000,000 / US$3,225,835-3,871,000. Courtesy Sotheby's.

Set with a cut-cornered rectangular modified brilliant-cut fancy intense blue diamond weighing 5.22 carats, to the single- and old European-cut diamond shoulders, mount signed Cartier, numbered, size 6.

Sotheby's. Magnificent Jewels, 7 October 2020, Hong Kong.