Our Exceptional diamonds
Petra’s mines continue to produce world-class gems. We have mined and sold the following exceptional diamonds to date:
Five high quality blue diamonds September 2020
Petra announced the recovery of five blue diamonds of high quality and clarity at the Cullinan mine in September 2020. The diamonds are also significant in terms of their size, being 25.75, 21.25, 17.57, 11.42 and 9.61 carats, and are assessed to be individual stones and not originally part of one larger diamond. It is considered very unusual to recovery five high quality stones around the same time, all in the spare of one week’s production.
20.08 carat blue diamond September 2019
A magnificent 20.08 carat Type IIb blue diamond was recovered at the Cullinan mine in September 2019. It subsequently sold for US$14.9 million (US$741,000 per carat) to an anonymous buyer in November 2019.
The Legacy of the Cullinan Diamond Mine April 2019
The 424.89 carat exceptional D colour Type IIa gem was recovered from the Cullinan mine in April 2019 and sold to Stargems Group / Choron (Belgium) BVBA for just under US$15 million in May 2019.
32.33 carat pink diamond March 2016
The exceptional 32.33 carat pink diamond recovered at Williamson mine in Tanzania sold for US$15.0 million (US$463,965 per carat) in March 2016 to Golden Yellow Diamonds on behalf of M.A. Anavi Diamond Group, a leading diamond manufacturer and specialist in large and unique coloured diamonds.
23.16 carat pink diamond December 2015
The exceptional 23.16 carat pink diamond recovered at Williamson mine in Tanzania sold for US$10,050,000 (US$433,938 per carat) in December 2015 to Golden Yellow Diamonds on behalf of M.A. Anavi Diamond Group, a leading diamond manufacturer and specialist in large and unique coloured diamonds.
232 carat white diamond September 2014
This exceptional 232.08 carat white diamond, discovered at Cullinan, sold in October 2014 for US$15,219,219 (US$65,577 per carat) to Diacore, a multinational diamond company.
The Cullinan Dream June 2014
This 122.52 carat blue diamond, recovered from Cullinan, sold for US$27.6 million (US$225,269 per carat) to a beneficiation partnership comprising Petra (15%) and its polishing partner (85%). The stone was cut and polished into four notably sized diamonds, of which the 24.18 carat Cullinan Dream is the largest. Upon sale of the polished, Petra will receive its 15% share in the proceeds, after beneficiation and related expenses.
The Cullinan Dream sold for US$25,325,000 in New York on 9 June 2016 and is the largest and most valuable Fancy Intense blue diamond ever auctioned.
Read about Christie’s Magnificent Jewels auction
View Christie’s latest video to experience The Cullinan Dream
The Blue Moon of Josephine January 2014
This exceptional 29.6 carat blue diamond was discovered at Cullinan in January 2014 and was noted as an outstanding blue with extraordinary saturation, tone and clarity.
It subsequently sold in February 2014 for US$25,555,555 (US$862,780 per carat – possibly a world record per carat for a rough diamond) to Cora International NY through the South African company Golden Yellow Diamonds.
After cutting and polishing, the stone was unveiled as the ‘Blue Moon’, a 12 carat cushion-cut diamond of the highest quality – being ‘fancy vivid’ blue in colour and ‘internally flawless’ in clarity.
This historic stone was temporarily on display to the public at the Natural History Museum in Los Angeles, during which time it boosted visitor figures between 10 to 15%.
In November 2015, the stone was sold at a Sotheby’s auction in Geneva for US$48.5 million (over US$4 million per carat), representing a world record price per carat for any diamond. This historic diamond was bought by Hong Kong collector Joseph Lau and was renamed the Blue Moon of Josephine in honour of his daughter.
Read The Tale of the Blue Moon of Josephine
Watch the cutting & polishing of the Blue Moon of Josephine
Watch a Bloomberg video on the Blue Moon of Josephine
25.5 carat blue diamond April 2013
In April 2013, an exceptional 25.5 carat blue diamond was recovered at Cullinan.
Following a highly competitive sales process, the diamond was sold in May 2013 for US$16.9 million (or US$663,114 per carat) to an undisclosed buyer.
The Cullinan Heritage September 2009
This 507 carat diamond was recovered on South Africa’s ‘Heritage Day’ in 2009 at Cullinan and was quickly ascertained to be the nineteenth largest high quality gem diamond ever discovered.
Petra sold this historic stone in February 2010 to Chow Tai Fook for US$35.3 million, which at the time was the highest price on record for a rough diamond.
Chow Tai Fook’s master craftsmen spent three years analysing and perfecting the best approach to cut the stone into a round, brilliant-cut, 104 carat diamond of exceptional colour and clarity. The Cullinan Heritage 1 was revealed to the world on 28 November 2014 in honor of Chow Tai Fook’s 85th anniversary.
This 104 carat stone, along with 23 further D colour internally flawless diamonds cut from the Cullinan Heritage, were used to create the masterpiece “A Heritage in Bloom”, by world-renowned jewellery artist Wallace Chan, unveiled in September 2015. “A Heritage in Bloom”, which followed three years of cutting and polishing – over 47,000 hours of craftsmanship, unites an entire family of diamonds cut from the same rough stone within a single piece of jewellery.
The piece, which can be worn in 27 different styles, combines thousands of white diamonds and hundreds of pink diamonds, totaling 383.4 carats, as well as more than 100 pieces of green jadeite and mutton fat white jade.
Read about “A Heritage in Bloom”
See the journey of “A Heritage in Bloom”
The Star of Josephine October 2008
In October 2008, Petra recovered a 26 carat blue stone at Cullinan.
This important diamond yielded a cushion-shaped cut stone of just over 7 carats, and achieved the highest colour and clarity grading for a blue diamond, being fancy vivid blue and internally flawless.
Petra sold this perfect gem through an auction house for US$9.49 million, or US$1.35 million per carat, which at the time was the world record price per carat achieved for any gemstone at auction.
This exceptional blue was bought by Hong Kong collector Joseph Lau and was renamed the Star of Josephine in honour of his daughter.