Describe how you can use your fingernail, a copper penny, and a steel knife blade to estimate the hardness of a mineral.

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asked Nov 2, 2019 141k views

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Teodora · Answer 1 · 2019-11-07T06:27:53+0000

According to the Mohs scale of mineral hardness, your fingernail has a hardness of about 2.5, a copper penny of about 5.0, and a steel knife blade of about 6.5.(hope this helps!)

Describe how you can use your fingernail, a copper penny, and a steel knife blade to estimate the hardness of a mineral.

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