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Can you melt a diamond?

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Yes it is possible. However it is impossible to do at standard temperatures and pressures like that at SATP. It has been done by the Z-Machine at the Sandia National Laboratories by using a pressure of 10 million times normal Atmospheric pressure. To create the pressure, the machine's magnetic fields hurled small plates at the diamond at 34 kilometers per second (21 miles per second), or faster than the Earth orbits the Sun.

Unfortunately in open air, the fact that is it large network of covalently bonded carbons make it extremely hard to melt in the first place. Secondly, diamond at high temperatures will not melt, rather it will prefer to burn, as characteristic of all carbon allotropes. A diamond will burn or oxidize when exposed to a hot flame in the presence of oxygen, for example an oxygen torch with a temperature of 800 degrees C (1,472 degrees F), according to The Merck Index, a standard chemistry reference work.

but it can be melted in the absence of air (or in vacuum) at a very very very high temperature
Since the melting point of diamond, the highest melting point required of any mineral -- 3820 degrees Kelvin -- a melted diamond is uncommon.

Read more about the mineral diamond, below.

Not humanly possible, but if temperatures reach (I will get back to you) it is possible.
It is pressure dependent. A normal atmospheric pressure it sublimates at about 4,330 degrees Celsius.

Yes, but only at extremely high temperatures, something like above 2000 degrees Celsius.
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Can diamonds be melted?

As a practical matter, no diamonds do not melt - once in their crystalline phase, they will simply break down into graphite and go up in smoke when subjected to high temperatu

How do you melt a diamond?

Hmmmmmmm. that's a very hard task. You'll lose a lot of money. Consider keeping it solid. There is a way, but I implore that you don't melt the diamond.

How are diamonds melted?

Diamonds are not usually melted, because their melting point is 3820 degrees Kelvin.

Can you melt a diamond and mix it with calcite?

Yes you can but it would take a very hot temperature for the diamond to melt. Not any normal hot temperature. Diamond has the highest melting point (3820 degrees Kelvin, or 6

Why can you melt a diamond?

You can melt a diamond, because anything can melt given enough heat. Diamond, however, has the highest melting point of any known mineral: 3820 degrees Kelvin, 6416.33 degrees
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how can you melt diamond?

Diamond is a form of carbon. Carbon melts at 8300 °F but only if  held under pressure of around 1600 psi. Diamond melts at 3,820 degrees Kelvin, which is the highest melting