27 Aug '11, 1pm

Astronomers discover planet made of diamond

Saturday August 27, 2011, 4:34 pm Thanks a lot to all friends who noted and comment..here I read from From Wikipedia, the free encyclopedia Most natural diamonds are formed at high-pressure high-temperature conditions existing at depths of 140 to 190 kilometers (87 to 120 mi) in the Earth mantle. Carbon-containing minerals provide the carbon source, and the growth occurs over periods from 1 billion to 3.3 billion years (25% to 75% of the age of the Earth). Diamonds are brought close to the Earth surface through deep volcanic eruptions by a magma, which cools into igneous rocks known as kimberlites and lamproites. Diamonds can also be produced synthetically in a high-pressure high-temperature process which approximately simulates the conditions in the Earth mantle. An alternative, and completely different growth technique is chemical vapor deposition (CVD). Several non-diam...

Full article: http://www.care2.com/news/member/739004526/2920103

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