A model holds up the 1,109-carat Lesedi la Rona diamond, reportedly the largest gem-quality rough diamond to be discovered in over 100 years, during an auction preview at Sotheby's auction house in New York in May 2016. Photo: EPA

Scientists discover a quadrillion tonnes of diamonds. But there’s a catch, of course

‘This shows that diamond is not perhaps this exotic mineral, but on the scale of things, it’s relatively common’

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A model holds up the 1,109-carat Lesedi la Rona diamond, reportedly the largest gem-quality rough diamond to be discovered in over 100 years, during an auction preview at Sotheby's auction house in New York in May 2016. Photo: EPA
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