Social Studies, 19.09.2019 19:00 champton79
Amineral sample scratches fingernails, pennies, and glass but does not scratch steel as shown below. what is the hardness of the mineral?
hardness test
a. about 4
b. about 5
c. about 6
d. about 7
Answers: 3
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Amineral sample scratches fingernails, pennies, and glass but does not scratch steel as shown below....
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