Beneath your feet, 400 miles down, lies an ocean’s worth of water—not in liquid form, but locked inside the crystal lattice of a rare blue mineral called ringwoodite. It’s a hidden reservoir that ...

A battered diamond that survived a trip from "hell" confirms a long-held theory: Earth's mantle holds an ocean's worth of water. "It's actually the confirmation that there is a very, very large amount ...

Deep below the surface of our world, far beyond our feeble reach, enigmatic processes grind and roil. Every now and then, the Earth disgorges clues to their nature: tiny chthonic diamonds encasing ...

Graham Pearson holds a diamond that contains the water-rich mineral "ringwoodite," a new discovery that yields new clues about the presence of large amounts of water deep beneath the Earth. Richard ...

A Brazilian diamond weighing less than one-tenth of a gram, forged hundreds of miles below the surface of the Earth, is acting as an emissary from the depths of our planet. And it’s bringing us news ...

A groundbreaking series of studies has revealed what many geologists long suspected: Earth may hold vast quantities of water far beneath its surface—potentially three times the volume of all our ...

It was a spring day in 2009, and John McNeill had a pocket full of diamonds. His PhD advisor, geochemist Graham Pearson, had sent McNeill to a lab in Vienna with a film canister that rattled with ...

The journal Nature announced a spectacular discovery last week. Geophysicists working in Brazil uncovered a diamond containing the mineral ringwoodite that came steaming out of a volcano, settling a ...