The ultradeep cache may be scattered within cratonic roots - the oldest and most immovable sections of rock that lie beneath the center of most continental tectonic plates. ![]() The scientists estimate the precious minerals are buried more than 100 miles below the surface, far deeper than any drilling expedition has ever reached. But the new results are unlikely to set off a diamond rush. ![]() There may be more than a quadrillion tons of diamond hidden in the Earth’s interior, according to a new study from MIT and other universities.
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