Is turning graphite carbon into diamond industrially doable?

I've read somewhere on the Internet that heating graphite at 4200°K at a sufficiently high pressure would turn it into diamond.


This chart seems to support this idea: ![enter image description here](https://i.stack.imgur.com/kOO8B.png)


Is that doable industrially?




[It has been done since 1954](https://en.wikipedia.org/wiki/Synthetic_diamond) and has been a commercial success for some time. Many products now have [diamond-like coatings](http://www.ibccoatings.com/dlc-coating-diamond-like-carbon-coating-ceratough-d), produced comparatively inexpensively through vapor deposition without need for high pressure.


BTW, in English "burning" means to set on fire, oxidize; I believe you mean "heating graphite", and, as your graph shows, **pressure** is needed as well as heat.


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You want to **heat** graphite at high pressure, not burn it - but yes, high-T, high-p will work. 



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> Is that doable industrially?
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There is a rather lengthy and informative Wikipedia article for [synthetic diamond](https://en.wikipedia.org/wiki/Synthetic_diamond) that illustrates (in part) the use of this process - HPHT, for "high pressure, high temperature"(using a high-purity source of carbon, not necessarily graphite) in industry. Note that there are several industrial processes mentioned in addition to HPHT.


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