speedy1 speedy1
  • 03-02-2015
  • English
Answered

diamonds are the hardest substance on earth fact or opinion



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dixondavion18
dixondavion18 dixondavion18
  • 03-02-2015
It is an fact. They are really hard to break.
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amsalvati99 amsalvati99
  • 03-02-2015
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.
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