Here is an interesting news about diamonds.Due to certain chemical reaction diamonds are carried along the way from certain kind of magma which is 150km deep inside the earth.
A mineral called orthopyroxene is gobbled changing the magmas chemical composition and belching carbon dioxide gas.
The Diamond mines tap volcanic rocks called kimberlites which contain many kinds of crystals that may be formed at high pressure which is 150 km in the layer called mantle. But Kelly russel,a volcanologist has explained it well.His team is making research on how quickly orthoryroxine and other minerals dissolve in the magma to estimate the speed at which kimberlites arise.
