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Diamonds Reveal Hidden 'Oceans' in Earth's Mantle

A tiny speck of of the mineral ringwoodite makes waves.

RELATED TAGS: EARTH SCIENCE
ringwoodite
A tiny diamond weighing less than 1∕200th of an ounce makes for a puny engagement ring, but what it tells geologists is priceless: Vast quantities of water might lurk unseen deep within the hot, thousand-degree confines of Earth.
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