The formation of natural diamond requires really specific conditions. It requires an exposure of carbon-bearing materials to high pressure, ranging some betwixt 45 as well as lx kilobars (4.5 as well as 6 GPa), but at a comparatively frigidness arrive at betwixt some 900 as well as 1,300 °C (1,650 as well as 2,370 °F). These atmospheric condition are met inward 2 places on Earth;
- Lithospheric mantle
- Site of meteorite strike
Lithospheric mantleThe formation of natural diamonds requires really high temperatures as well as pressures. These atmospheric condition occur inward express zones of Earth's mantle close xc miles (150 kilometers) below the surface where temperatures are at to the lowest degree 2000 degrees Fahrenheit (1050 degrees Celsius). This critical temperature-pressure environs for diamond formation as well as stability is non introduce globally. Instead it is idea to survive introduce primarily inward the drapery beneath the stable interiors of continental plates
Meteorite Strike SitesThroughout its history, globe has been repeatedly hitting yesteryear large asteroids. When these asteroids strike the earth, extreme temperatures as well as pressures are produced. For example: when a vi mile (10 kilometer) broad asteroid strikes the earth, it tin forcefulness out survive traveling at upwards to nine to 12 miles per minute (15 to twenty kilometers per second). Upon acquit upon this hyper-velocity object would create an loose energy outburst equivalent to millions of nuclear weapons as well as temperatures hotter than the sun's surface.
The heat as well as pressure level atmospheric condition of such an acquit upon are to a greater extent than than adequate to shape diamonds. This theory of diamond formation has been supported yesteryear the regain of tiny diamonds around several asteroid acquit upon sites. See Location three inward the diagram at the transcend of the page.
Tiny, sub-millimeter diamonds convey been constitute at Meteor Crater inward Arizona. Poly-crystalline industrial diamonds upwards to thirteen millimeters inward size convey been mined at the Popigai Crater inward northern Siberia, Russia.