# What is the melting point of diamond?

• Some additional information can be found here and the links within. Feb 20 '14 at 12:44
• melting point of diamond is 3823K
– user10066
Nov 29 '14 at 7:26
• I wish this question would include a question …
– Jan
Oct 22 '17 at 3:18
• Liquid diamond certainly sounds cool. It even glows! Mar 24 '19 at 12:03

Diamond (carbon) does not melt at 1 atm. It sublimes to vapor.

Using carbon's theoretical phase diagram below (from Wikimedia), "liquid diamond" could be achieved at about 10 GPa (99 thousand atmospheres) and 5000 K (4700 °C).

Edit:

In fact, heating up diamonds at 1 atm turns them into graphite first. Only further heating would cause sublimation, as expected by observing the phase diagram. Here's a video:

• Minor point: The quoted temperature conversion is mathematically correct, but in all probability no more than two digits are significant. Thus $5000 K=4700°C$. Oct 22 '17 at 10:01