Petra blue rough diamond

Sotheby’s Rakes In $57.5M for De Beers Blue

 A record blue diamond co-owned by De Beers far outstripped its presale estimate in a stand-alone sale at Sotheby’s in Hong Kong, garnering HKD 450.9 million ($57.5 million), the auction house said Wednesday. The step-cut, 15.10-carat, fancy-vivid-blue, internally flawless stone, called the De Beers Cullinan Blue, is the largest of its color to appear at … Read more

Petra puts “exceptional” 39-carat blue diamond up for sale

South Africa’s Petra Diamonds has put a 39.34 carat Type IIb gem recovered at its iconic Cullinan mine in April up for sale, with viewings beginning June 15. The company said the diamond of “exceptional quality” in terms of both its colour and clarity, will be showcased in Antwerp, Dubai, Hong Kong and New York. … Read more

Petra finds 39-carat blue diamond at Cullinan mine

39.34 carat blue diamond recovered

South Africa’s Petra Diamonds has found yet another big rock at its iconic Cullinan mine, a 39.34 carat Type IIb gem said to be of “exceptional quality” due to both its colour and clarity. The miner didn’t indicate the diamond’s potential value but said it would sell it in a special tender. Cullinan is known … Read more

Petra to sell blue diamonds recovered at Cullinan

A 20.08-carat Type IIb blue diamond recovered at Cullinan.

Petra Diamonds (LON: PDL) announced the launching of a special tender process for the Letlapa Tala Collection, which comprises five blue diamonds sourced from the Cullinan mine in South Africa.  Cullinan is known as the world’s most important source of blue diamonds, as well as being the place of birth of the 3,106-carat Cullinan diamond, … Read more