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What is Mohs Scale of Hardness? - Quora
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Mohs Scale of Hardness
What is the range of hardness found on the Mohs hardness scale? - Quora
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Geology Notes - Mohs Hardness Scale vs Knoop Hardness Scale Frederic Mohs created a relative hardness scale using ten readily available minerals, he assigned them integral values from 1 for the softest