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Earth Sciences
Geology

What allows diamonds to reach the earth's surface?

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March 16, 2012 5:57PM

'Allow' means to make possible, so you could say that erosion allows diamonds to reach the earth's surface. But it's more interesting than that.

Diamonds are formed deep within the earth's mantle and are erupted to the surface -- or near the surface to account for erosion, as above -- by volcanic pipes.