History and Development
The Premier Diamond Mining Company became based through Thomas Cullinan (later Sir Thomas) in 1902, near the stop of the second Boer War (South African War 1899 – 1902). The land become firstly a part of the Cornelis Minnaar Farm and turned into purchased for a sum general of £52,000 by means of Thomas. The employer was first registered at the 6th November 1902 because the Premier Syndicate but changed into later re-registered because the Premier Transvaal Diamond Mining Company Ltd. On 1st December, 1902. 婚戒
Cullinan Village became set up in 1903 to offer housing and services for mine personnel and is positioned approximately 40 kilometers east of the South African capital of Pretoria in the Gauteng Province.
One of the most notable and famous diamond discoveries took place on the Premier Diamond Mining Company on twenty sixth January, 1905 whilst a young miner named Thomas Evan Powell brought a massive 3106.75ct rough gem pleasant diamond to his floor supervisor Frederick Wells. The diamond is the largest gem-first-class diamond ever found and is famously called the Cullinan Diamond.
In 1910 Thomas Cullinan turned into knighted in reputation of his contribution to the diamond industry and in 1917 De Beers Consolidated Mines acquired a controlling interest within the mine but later offered it to a consortium in 2008. Today, Petra Diamonds is the technical operator of the mine on behalf of the business consortium (PDCC – Petra Diamonds Cullinan Consortium) as they have 74% interest inside the company.
In 2003 the mine became renamed The Cullinan Diamond Mine to celebrate 100 years due to the fact its preliminary establishing.
Modern Day Mining Techniques
The Cullinan Kimberlite pipe is situated at the solid Kaapvaal Craton that’s envisioned to be approximately 3 billion years old. It is the world’s second biggest diamond aid of 181.Four million carats (general resource base of 203.3 million carats). The pipe itself resembles a carrot shape and stretches 32 hectares at the surface (more or less 30 soccer pitches) and stretches 1,073 meters deep.
From 1902 to its pressured closure in 1932 due to the monetary depress, the mine operated as an open-pit with a depth of 189 meters. When the mine re-opened again in 1946 it started out manufacturing beneath various mining techniques. The early 1970’s utilized cave mining with the early 1980’s performing sub-degree open stoping. Today, the mine is at a intensity of 747 meters and is the usage of mechanized trackless block-cave mining as their fundamental method of diamond ore extraction.
Cullinan Diamond History and Notable Discoveries
In 1905, the mine famously uncovered the 3106.75ct rough Cullinan Diamond. The difficult diamond measured 10 cm lengthy with the aid of 6 cm excessive and five cm thick and weighed in at 621.2 grams. The difficult diamond changed into bought to the Transvaal government for £150,000.00 who then proficient it to King Edward VII on his 66th birthday on November 9th, 1907. It has on account that been break up and reduce into nine important stones and 96 smaller stones. These 9 major diamonds and their wellknown records are designated under:
The Cullinan I – Also referred to as the Great Star of Africa, is a pear shape weighing 530.20 carats and is presently set in the Royal Sceptre.
The Cullinan II – Also referred to as the Lesser Star of Africa, is a square cushion shape diamond weighing 317.40 carats and is currently set inside the center of the Imperial State Crown of Great Britain.
The Cullinan III – A pear form weighing ninety four.Forty carats originally set in the orb of Queen Mary’s Crown. It is currently putting from the Cullinan IV in a brooch.
The Cullinan IV – A square cushion weighing sixty three.60 carats in the beginning set inside the band of Queen Mary’s crown. It presently forms a part of a brooch collectively with the Cullinan III.
The Cullinan V – A heart form weighing 18.50 carats at the start hooked up in a brooch for Queen Mary however is now set as a replacement for the Koh-i-Noor diamond which turned into used in a new crown made for Queen Elizabeth (Queen Mother) in 1937.
The Cullinan VI – A marquise form weighing eleven.50 carats originally given by using Edward VII to Queen Alexandra. After his demise the Queen then gave the stone to Queen Mary who had it set as a pendant putting from the diamond and emerald necklace inside the Delhi Durbar Parure.
The Cullinan VII – A marquise shape weighing 8.Eighty carats that is presently mounted as a pendant drop on a diamond brooch containing the Cullinan VIII. It is a part of the stomacher of the Delhi Durbar Parure.
The Cullinan VIII – A rectangular cushion shape weighing 6.8 carats that is currently hooked up as the middle diamond on the equal brooch because the Cullinan VII.
The Cullinan IX – A pear form weighing four.39 carats and is set as a bezel in a ring.
The Cullinan Diamond Mine has lately exposed different big top notch diamonds. In May of 2008 a 460 carat hard diamond became discovered. The tough was then reduce to a 101.27 guard-formed diamond with ninety two wonderful facets. The diamond is internally ideal and was offered at Chrisities in Hong Kong for $6.2 million bucks. This diamond is the largest colorless diamond to seem on public sale for the last 18 years.
In September of 2009 another large diamond discovery at the mine changed into made. A whopping 507 carat diamond changed into discovered and is currently ranked as one of the 20 biggest excessive great diamonds ever found. Petra bought this diamond for $35.3 million on 26 February 2010 and broke the document for the best rate every paid for a difficult diamond.
The Cullinan Diamond Mine Global Diamond Production
In July 2008, De Beers Consolidated Mines (DBCM) bought its Cullinan mine for R1-billion to a consortium produced from Petra Diamonds, Al Rajhi Holdings, and Thembinkosi Mining. The mine has produced greater than 25% of all of the global’s diamonds that weigh more than 400 carats and is the best widespread supply of the very uncommon and treasured blue diamonds.
Now that the mine is below new possession, it is undergoing a ramification undertaking with an anticipated finishing touch date of 2019. The growth will take production from simply over 920,000 carats (2010) to 2.4 million carats (2019). Once the enlargement is entire, the gross annual sales is envisioned at approximately $235 million greenbacks. It is said that the mine’s production existence is estimated to be round 50+ years.
The Cullinan Diamond Mine has a rich and colourful history spanning the remaining a hundred and ten years having uncovered some of the maximum extensive diamond discoveries ever found. Under new control the mine maintains to develop and add to the world’s worldwide diamond market with its manufacturing of massive high exceptional Type II gem diamonds and uncommon blue diamonds. With an predicted 50 more years of diamond production, the world can look forward to many extra rare and beautiful diamonds discovered within the international’s 2d biggest kimberlite pipe.
Carl is a diamond enthusiast and enjoys the study of gemology and mineralogy. He enjoys assisting pals and circle of relatives find out about popular diamond cut brands like Hearts On Fire and Forevermark.