Answers

2016-01-20T21:37:50+08:00
Diamond is the Hardest Stone
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2016-01-27T10:31:02+08:00
The first, wurtzite boron nitride has a similar structure to diamond, but is made up of different atoms. The second, the mineral lonsdaleite, or hexagonal diamond is made from carbon atoms just like diamond, but they are arranged in a different shape
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according to my reasearch diamond is no longer now the hardest stone