In Sotheby’s upcoming Magnificent Jewels and Jadeite Sale in Hong Kong this spring, an 88.22-carat oval brilliant diamond will take the spotlight with an expectation to fetch between HK$88m - 100m (US$11.2m-12.7m).

An 88.22-Carat, D Colour, Flawless, Type IIa Oval Diamond｜Estimate: HK$88m - 100m (US$11.2m-12.7m)

The diamond has achieved the highest rankings under each of the four Cs (the standards by which the quality of a stone is judged). It weighs impressive 88.22 carats. The diamond is D colour, the highest grade for a white diamond. It is completely flawless, both internally and externally. The stone belongs to the rare subgroup comprising less than 2% of all gem diamonds, known as Type IIa*.

An 88.22-Carat, D Colour, Flawless, Type IIa Oval Diamond｜Estimate: HK$88m - 100m (US$11.2m-12.7m)

Jwaneng mine, Botswana

This exceptional large diamond was yielded from a 242-carat rough stone that was discovered in Botswana in the mine of Jwaneng, which was known for producing roughs of the highest quality.

A 102.34-carat, D Colour, Flawless, Type IIa white diamond

A 102.34-carat, D Colour, Flawless, Type IIa white diamond

In April 2018, a 102.34-carat white diamond was sold to a private collector through Sotheby’s Diamonds. It is the only known round brilliant diamond over 100 carats to have achieved perfection by all 4Cs. The final price sold was estimated to be in excess of HK$100m.

Two 50-carat white diamonds fetched CHF 17.4m at Geneva Auction

A 51.71-carat round diamond

A 50.39-carat oval diamond

In May 2018, two white diamonds - a 51.71-carat round diamond and a 50.39-carat oval diamond - sold above their high estimate for US$9.3m and US$8.1m respectively.

Auction details

Auction house: Sotheby’s Hong Kong
Sale: Magnificent Jewels and Jadeite
Sale date: 2 April 2019｜2pm, 4pm
Viewing in Hong Kong:
29 March 2019｜10am - 5:30pm
30-31 March 2019｜10am - 8pm