Diamond is ultra-hard, by what to cut it?

Diamond is the hardest substance in nature, but to cut it, such as cut diamonds, with what tool? Is it also the diamond itself?

Of course not.

Although diamond is the hardest, but it's toughness is poor, it is also the most "fragile". The traditional cut diamond is called "cleavage", the corresponding tool called "cleavage knife" was actually a metal knife, diamond crack. But knocking down beforehand to rigorous analysis. Otherwise, we can not sort out solutions to meet the requirements of shape and size.

Once the world's most famous cleavage, undoubtedly the world's largest diamond the Cullinan. It is said that time artisans have never seen such a big diamond, even after successful cleavage, cutters spot in shock. After being cleaved Cullinan, Cullinan on the 1st largest inlaid into the battle right to the Queen of England.

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