The Premier Mine is an underground diamond mine owned by Petra Diamonds. It is situated in the town of Cullinan, 40 kilometres east of Pretoria, Gauteng Province, South Africa. Established in 1902, it was renamed the Cullinan Diamond Mine in November 2003 in celebration of its centenary. The mine rose to prominence in 1905, when the Cullinan Diamond — still the largest rough diamond of gem quality ever found — was discovered here. It is also the only significant source of blue diamonds in the world.
Cullinan Diamond Mine sold to Petra Diamonds
De Beers, the world's largest diamond producer, said on Thursday 22 November 2007 it had sold its historic Cullinan mine to a consortium led by Petra Diamonds.
The Cullinan Diamond is the largest rough gem-quality diamond ever found, at 3,106.75 carats (621.35 g). It was found by Frederick Wells, surface manager of the Premier Diamond Mining Company in Cullinan, Gauteng, South Africa, on 25 January 1905. The stone was named after Sir Thomas Cullinan, the owner of the diamond mine.
In May 2008, a sparkling shield-shaped 101.27 carats (20.254 g) diamond (about the size of a pingpong ball) mined from the Premier Mine sold for more than $6.2 million at Christie's in Hong Kong. Cut from a 460 carats (92 g) rough, the shield-shaped gem boasts 92 brilliant facets. While internally flawless, the stone has a slight imperfection on the surface that is imperceptible to the human eye, the auction house said. It is the largest colourless diamond to appear on the auction market in the last 18 years, Christie's said. Only three diamonds of more than 100 carats (20 g) have appeared at auction. All were sold in Geneva. Naming rights were granted to the new owner.
In September 2009, a 507-carat (101.4 g) diamond was found, and is ranked as one of the 20 biggest high quality diamonds ever discovered. Petra Diamonds sold the 507-carat (101.4 g) diamond for $35.3 million on 26 February 2010, breaking a record as the highest price ever paid for a rough diamond.
On 18 April 2013 a 25.5 carat blue rough diamond was recovered by Petra Diamonds at its Cullinan mine. According to experts it could be worth more than $10m. The find gave a boost to Petra's share price. The mine has produced hundreds of large stones and is famed for its production of blue diamonds. A similar 26.6-carat blue rough diamond recovered by Petra in May 2009 was cut into a near perfect stone and fetched just under $10m at Sotheby's. Another deep-blue diamond from Cullinan was auctioned for $10.8m last year and set a world record for the value per carat.
- Diamond Mines of South Africa, Premier Diamond mine overview + images by A.R.Williams former General Manager of De Beers (900 page overview).
- De Beers sells South African Cullinan Diamond Mine
- "Who paid record price for huge diamond?". Sydney Morning Herald (smh.com.au). 2008-05-29. Retrieved 2013-10-01.
- "'Spectacular' new diamond found". BBC News. 2009-09-29. Retrieved 2013-10-01.
- Khám phá viên kim cương mới tuyệt đẹp (Vietnamese)
- It was named the "Star of Josephine" by its new owner
- "Mining company in South Africa finds rare blue diamond". BBC News. 2013-04-18. Retrieved 2013-10-01.
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