industry diamond mining founded 1997 headquarters jersey key people adonis pouroulis chairman johan dippenaar ceo production output 3 110 000 carats 2014 1 revenue us 471.8 million 2014 1 operating income us 124.4 million 2014 1 net income us 67.5 million 2014 1 website petradiamonds.com petra diamonds ltd is a diamond mining group headquartered in jersey . it has a diversified portfolio with interests in eight producing mines in south africa and tanzania and an exploration programme in botswana . petra diamonds focus has shifted from exploration to production becoming one of the largest independent producers of diamonds in africa . in june 2012 petra owns 5 of the world s most productive mines historically . 2 these mines include the cullinan diamond mine famed for having produced the world s largest rough and polished diamond . petra is listed on the london stock exchange . contents 1 history 2 operations 2.1 south africa 2.1.1 finsch mine 2.1.2 cullinan mine 2.1.3 koffiefontein 2.1.4 kimberley underground 2.1.5 fissure mines 2.2 tanzania 2.3 botswana 3 see also 4 references 5 external links history edit petra diamonds was founded by adonis pouroulis in 1997 and was first listed on the alternative investment market later that year . 3 it transferred to the main market in december 2011 . 4 operations edit petra diamonds operations are focused in africa which produces circa 60 % of the world s diamonds by value . it has grown by acquisition acquiring five mines in south africa and tanzania from de beers . petra s exploration activities are focused in botswana the world s largest diamond producer by value and host to two of the world s biggest diamond mines orapa diamond mine and jwaneng diamond mine . south africa edit petra diamonds operates four producing diamond mines in south africa . these are all underground kimberlite pipe mines cullinan finsch koffiefontein and kimberley underground . the company also had three smaller fissure mines helam sedibeng and star but sedibeng and star have recently closed and helam is being run down for closure . petra diamonds has a record of turning de beers unprofitable south african mines into financial successes . according to nicky oppenheimer chairman of de beers the reason for this was de beers was operating the mines with too large a cost structure something petra doesn t have . 5 the underground kimberlite mines were purchased from de beers consolidated mines . finsch mine edit finsch diamond mine is one of the world s most important diamond mines and south africa s second largest diamond operation by production . on 14 september 2011 petra purchased finsch as a fully staffed operating mine from de beers for a total consideration of zar1 .4 billion . finsch is a major producer having supplied over 126 million carats in its 40 plus year life to date . petra is currently implementing a development plan to lift production from ca. 1.4 million carats per annum to 1.9 million carats per annum by fy 2017 involving both underground and tailings production . 6 cullinan mine edit main article premier mine in july 2008 petra led a consortium which acquired the cullinan diamond mine from de beers consolidated mines for a total cash consideration of zar1 billion . in line with the south african mining charter the petra diamonds cullinan consortium included broad based black economic empowerment partners . the cullinan kimberlite pipe is the second largest indicated diamond resource in the world by in situ value . the current operating levels include the b cut at a depth of 747 metres and beneath that lies the centenary cut the c cut a world class diamond resource . the mine hosts a total resource of 202.1 million carats including 16.5 million carats in tailings dumps . the mine previously known as premier diamond mine is renowned for producing many of the world s largest and most famous diamonds including the cullinan diamond the world s largest gem diamond at 3 106 carats 0.6212 kg rough . sir thomas cullinan the former chairman of the premier diamond mine presented the cullinan to england s king edward vii in 1905 . 7 the great star of africa which sits in the sceptre of the crown jewels was produced from the cullinan diamond and was until recently acknowledged to be the largest cut diamond in the world weighing in at 530.20 carats 106.040 g . in 1985 it lost the record to the golden jubilee which was found in the same mine as the cullinan and weighed 545.67 carats 109.134 g in its polished state . more than a quarter of all diamonds weighing more than 400 carats 80 g have originated from cullinan . it is also the world s only significant source of blue diamonds . one of these famous large blue diamonds was cut into several stones and made into a necklace which subsequently became known as the cullinan blue diamond necklace . 8 the cullinan mine continues to produce large stones . the cullinan heritage a 507 carat 101.4 g white diamond was discovered in september 2009 . this stone was the 19th biggest uncut diamond ever found and was sold in february 2010 to chow tai fook jewellery for 35.5 m the highest price ever paid for an uncut diamond . 9 the previous record was held by gem diamonds leseli la let eng which was bought for 18.4 m by graff diamonds in december 2008 . 10 koffiefontein edit koffiefontein mine is one of the world s top diamond mines by average value per carat and produces exceptional white and coloured diamonds a regular proportion of which are of between 5 and 30 carats . in 1994 a 232.34 carat diamond was recovered at koffiefontein being the largest rough diamond ever produced by the mine . diamonds were first discovered on the koffiefontein farm in 1870 . mining started in the form of small claims that were later amalgamated into koffiefontein mine limited . de beers acquired control of koffiefontein mine limited in 1911 . mining operations were then continuous until the advent of the great depression in 1932 when work was suspended . between 1950 and 1953 a prospecting shaft was sunk which was followed by limited production . the mine was reopened in 1970 and preparations for increased production were completed in august 1971 . immediately after completing the preparations production from the open pit commenced and proceeded to a depth of 270 metres . underground development started in 1974 through a sampling programme . underground production briefly took place in 1982 but ceased soon thereafter due to the 1981 slump in the diamond market . these operations were resumed in march 1987 . during the period 1972 to the end of 2004 approximately 69.5 million tonnes of kimberlite ore were mined and 6.1 million carats of diamonds were recovered . in february 2006 de beers ceased mining when the old order mining right for koffiefontein expired and in july of that year petra diamonds commenced operating the mine under care and maintenance conditions . the acquisition of the mine was completed in july 2007 and petra diamonds was subsequently able to commence diamond recoveries by starting to process the stockpile through the plant . 11 kimberley underground edit kimberley underground comprises three kimberlite pipe mines in close proximity bultfontein dutoitspan and wesselton . these mines were integral to the economic development of south africa as their output effectively financed development of the nascent gold industry . they are currently mining at depths of between 845 and 995 metres below surface . the mines have a history of producing large diamonds and fancy yellows such as the oppenheimer diamond 253 carats rough . the largest diamond ever recovered at kimberley underground was 800 carats and the mine is also the source of the kimberley octahedral at 616 carats one of the largest uncut diamonds in the world . 12 the mines were closed by de beers in august 2005 and subsequently petra operated kimberley underground under care and maintenance from september 2007 . petra was given approval to operate the mines under de beers licence and the acquisition completed in may 2010 . 13 fissure mines edit the fissure mines were acquired by petra when it merged with crown diamonds nl in may 2005 introducing producing assets to what had previously been an exploration company . tanzania edit petra agreed to acquire the williamson mine in tanzania in september 2008 from de beers and completed the acquisition in february 2009 . 14 the williamson mine which was discovered in 1940 has a reputation for the production of large high value diamonds with special stones classified as larger than 10.8 carats 2.16 g produced regularly . the mine is also famed for its pink diamonds . in 1947 the mine s founder dr. john williamson presented princess elizabeth later elizabeth ii with a flawless 54 carat 10.8 g pink diamond the williamson pink diamond on her wedding day . the eventual 23.6 carat 4.72 g cut diamond became the centre stone in the williamson diamond brooch and is supposedly the basis for the pink panther diamond in the film of the same name . 15 the williamson mine currently has a resource of 39.6 million carats 8 000 kg 984 million tonnes of kimberlite . it has an average mining depth of 65 metres 90m at the deepest point and a very low stripping ratio . energy and minerals minister william ngeleja said petra s entry is an opportunity to breathe new life into williamson mine and tanzania s diamond mining sector . 16 botswana edit petra commenced exploration in botswana following the acquisition of kalahari diamonds in september 2005 . petra diamonds botswana is the holder of approximately 21 519 km2 of diamond exploration ground all of which is on craton the geological formation known to host diamonds . the company s current focus is on the kx36 kimberlite discovery in the kukuma east project area and the potential for further discoveries in the area . 17 see also edit diamonds as an investment references edit a b c d annual report 2014 pdf . petra diamonds . retrieved 1 april 2015 . janse aja 2007 . global rough diamond production since 1870 . gems and gemology . gia . xliii summer 2007 98 119 . doi 10.5741 gems .43.2.98 . johan dippenaar prices for both rough and polished are performing well currently and we believe that the longer term fundamentals of the market are robust rough & polished 27 june 2011 petra diamonds shares begin main market trading mining journal 21 december 2011 petra buys de beers kimberley mine for r78 .5 m mining mx 14 september 2007 petra to produce 1.5 m ct per year at newly acquired finsch diamond mine rough & polished 10 february 2011 gemstones diamonds books farlang . farlang . retrieved 1 april 2015 . exploring africa s gem trail the loupe gia world news winter 2009 dawber alistair 2010 02 27 . egg sized diamond sold to hong kong jeweller for a record 35m . the independent . london . gem s biggest diamonds the telegraph koffiefontein mine rough & polished database kimberley octahedron diamond internet stones petra to reopen kimberley mines south africa info 17 september 2007 tanzania petra buys de beers 75 percent stake in dar mining firm for 10 million all africa 14 september 2008 the williamson diamond brooch the royal collection . royalcollection.org.uk . mixed outlook as diamond giant de beers sells williamson mine to petra all africa 16 september 2008 drilling at botswana s kimberlite kx36 shows strong micro diamond results petra rough & polished 15 march 2012 external links edit official website retrieved from https en.wikipedia.org w index.php title petra diamonds & oldid 695831822 categories companies of jerseydiamond mining companiescompanies established in 19971997 establishments in jerseycompanies listed on the london stock exchange navigation