What is the hardest substance?

The hardest substance on our huge planet for the current period of time is exactly ultra-hard fullerite, and not diamond as many think. It is about one and a half times harder than diamond. It should be said that this fullerite is precisely the allotropic form of the purest carbon (chemical element of the fourteenth group). It can be obtained not only in the laboratory, it can be formed even under natural conditions.



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