Geography, 28.10.2020 04:10, tydukes10

Easy 75 points > You have a piece of quatz, whos hardness is 7, and an unknown mineral. explain how you would determine if the unknown mineral had a hardness greater or less then 7. If you answer incorrectly I will delete it and with it any points you got for fake answering.

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Easy 75 points > You have a piece of quatz, whos hardness is 7, and an unknown mineral. explain h...

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