Diamonds are the hardest substance on earth fact or opinion

asked Aug 1, 2016 156k views

4 votes

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2 votes

As far as we know, this is true. Though they are very hard, like most network solids, they are also brittle if hit the correct way.

Ultimater answered Aug 3, 2016

7.2k points

4 votes

It is an fact. They are really hard to break.

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