Fredfavors1 Fredfavors1
  • 23-10-2017
  • Physics
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which of the materials would be able to scratch Quartz

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Аноним Аноним
  • 23-10-2017
anything harder than mohs scale 7 so eg Topaz, Corundum and diamond representing mohs scale 8 9 and 10 respectively.
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