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Junior Class 5 Answered

which is the hardest rokc on earth. which rock cancut it  
Asked by vicaz261 | 15 Mar, 2017, 09:11: PM
answered-by-expert Expert Answer
There is no such hardest rocks on our planet. Hardness is a mineral property. Most rocks are mixtures of minerals.
But the strongest rock include quartz.
Answered by Sivanand Patnaik | 16 Mar, 2017, 09:47: AM
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