speedy1 speedy1

04-02-2015
English

contestada

diamonds are the hardest substance on earth fact or opinion

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dixondavion18 dixondavion18

04-02-2015

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

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amsalvati99 amsalvati99

04-02-2015

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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