Coal has never been at sufficient depth and temperature to be turned into diamond. Coal is simply fossilized plant remains that are high in the element carbon, of which the mineral diamond is also composed.
No, you cannot make diamonds by burning coal. To turn coal into diamonds, you need tremendous heat and also tremendous pressure. Merely burning the coal is not nearly enough heat, and you would also still need to increase the pressure.
Another Answer
The molecules in coal are arranged differently from the molecule arrangement in diamond -- although both are allotropes of carbon, you cannot form a diamond from coal under any pressure or temperature.
Both coal and diamond are allotropes of carbon, simply with different atomic patterns.
No. coal is coal and diamond is diamond. They are both formed from carbon, but diamond is much harder than coal.
A diamond is not formed from coal. Diamond and coal are both allotropes of carbon, and are formed by different processes.
Diamond does not turn into coal when exposed to flame.
No 'coal' turns into 'diamond'. Both coal and diamond are composed of carbon, each being formed at different layers in the earth's mantle.
Diamond is more dense that coal.
No. coal is coal and diamond is diamond. They are both formed from carbon, but diamond is much harder than coal.
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Yes. Both diamond and coal are formed from carbon.
A diamond is not formed from coal. Diamond and coal are both allotropes of carbon, and are formed by different processes.
Diamond does not turn into coal when exposed to flame.
No 'coal' turns into 'diamond'. Both coal and diamond are composed of carbon, each being formed at different layers in the earth's mantle.
No,The process in which turns coal into diamond cannot be reversed or "undone"
Probably because both coal and diamond are composed of carbon.