4 ms·Even diamonds can melt. Coincidentally they melt at the same temperature.by ahoka 3y agoEven diamonds can melt. Coincidentally they melt at the same temperature.mcpackieh 3y agoCarbon will never melt at atmospheric pressure, you need more than 100 atmospheres of pressure to melt carbon. Otherwise it just sublimates straight to gas.chmod600 3y agoWhat gas does it sublimate into?mcpackieh 3y agoGaseous carbon.