Could other planets make a substance like diamond? We ask a deep space mining expert.
this leads me to another thought. diamonds are made from carbon at high heat and pressure so then if a plaint has a high level of carbon with a higher amount of heat and pressure than Earth can we get a carbon compound harder than diamond? Or is diamond as hard as carbon can get? allgoaway, Mon, 2nd Sep 2013
Hello allgoaway, at least by the indentation test there are some materials that appear to be harder than diamond: Harder than Diamond: Superior Indentation Strength of Wurtzite BN and Lonsdaleite