Record blue diamond

Record blue diamond

Only five blue diamonds weighing between 10 and 15 carats have ever come to auction.

The Blue Moon of Josephine, a cushion-shaped, 12.03-carat, fancy-vivid-blue, internally flawless, was sold by Sotheby’s Geneva in 2015 for US$48.5 million, and the Oppenheimer Blue, a step-cut, 14.62-carat, fancy-vivid-blue, VVS1-clarity stone, was sold by Christie’s Geneva in 2016 for US$57.5 million.

Diamonds are forever

In April 2021, Petra Diamonds recovered a blue diamond of “exceptional quality in terms of both its colour and clarity”, weighing 39.34 carats at its Cullinan mine in South Africa, which it sold to De Beers and Diacore for $40.2 million in July 2021. It was named the De Beers Cullinan Blue.

And diamonds are a girl’s best friend too!

Diacore, which specialises in manufacturing rare, fancy-color diamonds, cut the 203.04-carat De Beers Millennium Star, as well as working on other well-known stones such as the CTF Pink Star, the 59.60-carat pink bought by Hong Kong jeweller Chow Tai Fook for $71.2 million in 2017. It has cutting facilities in Botswana, South Africa and Namibia, and was one of the pilot participants in De Beers’ Tracr blockchain initiative.

The Letlapa Tala Collection

Petra also sold five other rough blue diamonds from Cullinan to De Beers and Diacore for US$40.4 million in 2021, the Letlapa Tala Collection. Their combined weight was 85.6 carats, and they ranged from 9.61 to 25.75 carats.

The De Beers Cullinan Blue will be auctioned at Sotheby’s in a stand-alone sale in Hong Kong in April 2022, and carries an estimate of US$48 million.

It is a step-cut, 15.10-carat, fancy-vivid-blue, internally flawless stone, the largest of its colour to appear at auction, “Blue diamonds of any kind are rare on the market, but this is the rarest of the rare; nothing of remotely similar calibre has appeared at auction in recent years,” said Sotheby’s Asia chairman Patti Wong. “Brought to dazzling life by the hand of one of the world’s most skillful cutters, it is the ultimate masterpiece — as rare and desirable as the very greatest works of art. At a time of unprecedented demand for the finest, world-class, coloured diamonds, we are incredibly excited to bring to the market what is sure to become one of the most celebrated gems in the world.”

Blue diamonds are exceptionally rare, occurring when trace amounts of the element boron are found within the diamond crystal lattice.

There are only a handful of mines where blue diamonds can be sourced, and most discovered to date have been recovered from the Cullinan mine in South Africa, just as Argyle in Australia is famous for pinks.

Whatever size, shape or colour diamond you would like, come to Diamonds by Design or Anania – and if we don’t have it in stock we’ll source it for you.

You can never take too much care over the choice of your sunglasses and jewlery.