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From Wikipedia:
"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."
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∙ 13y ago
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Is coal a black diamond?
No. coal is coal and diamond is diamond. They are both formed from carbon, but diamond is much harder than coal.
Is diamond and coal minerals?
Yes. Both diamond and coal are formed from carbon.
What phases does coal go through before it forms a diamond?
A diamond is not formed from coal. Diamond and coal are both allotropes of carbon, and are formed by different processes.
Why does a diamond turn into coal when it's burned?
Diamond does not turn into coal when exposed to flame.
What type of coal turns into a diamond?
No 'coal' turns into 'diamond'. Both coal and diamond are composed of carbon, each being formed at different layers in the earth's mantle.
Will a diamond turn back into coal?
No,The process in which turns coal into diamond cannot be reversed or "undone"
Why is coal referred to as black diamond?
Probably because both coal and diamond are composed of carbon.
Coal and diamond are two different forms of carbon which is more dense?
Diamond is more dense that coal.
Can coal change into a diamond?
no
Are coal and diamonds both organic?
Coal, yes. Diamond, no.
What type of coal has the most stored energy?
Coal that has become diamond.
What do a diamond and a lump of coal and graphite have in common?
both a diamond and a lump of coal are primarily composed of the element Carbon (C)
