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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
Agence France-Presse

There’s a load of bling buried in the Earth.

More than a quadrillion tonnes of diamonds to be exact – or one thousand times more than one trillion – US researchers at the Massachusetts Institute of Technology reported this week.

But don’t expect a diamond rush. These naturally occurring precious minerals are located far deeper than any drilling expedition has ever reached, about 145 to 240km below the surface of our planet.

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“We can’t get at them, but still, there is much more diamond there than we have ever thought before,” said Ulrich Faul, a research scientist in MIT’s Department of Earth, Atmospheric, and Planetary Sciences.

“This shows that diamond is not perhaps this exotic mineral, but on the scale of things, it’s relatively common.”
In this photo taken on December 4, 2017, the Peace Diamond is on display at the Rapaport Group in New York. Photo: Agence France-Presse
In this photo taken on December 4, 2017, the Peace Diamond is on display at the Rapaport Group in New York. Photo: Agence France-Presse
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Using seismic technology to analyse how sound waves pass through the Earth, scientists detected the treasure trove in rocks called cratonic roots, which are shaped like inverted mountains that stretch through the Earth’s crust and into the mantle.

These are “the oldest and most immovable sections of rock that lie beneath the centre of most continental tectonic plates,” explained MIT in a statement.

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