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Rio Tinto discovers Australia's biggest rough pink diamond at Argyle

Rio Tinto | February 23, 2012 | 5:45 am Australia Europe Diamond 

Perth, February 21, 2012 - Australia's biggest pink rough diamond has been discovered at Rio Tinto's Argyle mine, the world's largest producer of rare pink diamonds. The 12.76 carat diamond was unearthed at the Argyle open pit in the East Kimberley...

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