Giant blobs in Earth’s mantle may be driving a ‘diamond factory’

The boundary zone between Earth’s molten steel core and the mantle, its rocky center layer, is likely to be a diamond manufacturing unit. 

A brand new laboratory experiment finds that, beneath excessive temperatures and pressures, the mix of iron, carbon and water — all potential components discovered on the core-mantle boundary — can type diamond. If this course of additionally occurs deep inside Earth, it would clarify some bizarre quirks of the mantle, together with why it has extra carbon in it than scientists count on. 

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