why is quartz sand so hard

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  • Why is Quartz hard? Quora

    Why is Quartz hard? Update Cancel. ... Because the atoms are so tightly bonded there are few weak points in the crystal and therefore quartz ... Why is quartz used in ...

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    Hawaii beach sand composition To-Hawaii.comMost beaches in the world Why Is Quartz Sand So Hard are made up of the quartz mineral; others contain small It has a ...

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  • Properties of Minerals? Yahoo Answers

    Sep 12, 2012· Why is quartz so hard? A) Quartz has only one plane of cleavage. B) Quartz has three planes of cleavage. C) Quartz has equally strong bonds in all directions.

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  • Quartz Wikipedia

    Quartz is a mineral composed of silicon and oxygen atoms in a continuous framework of SiO 4 siliconoxygen tetrahedra, with each oxygen being shared between two ...