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Hardness of a mineral depends upon ___________

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Hardness of a mineral depends upon ___________

(a) Chemical composition

(b) Atomic constitution

(c) Chemical composition and atomic constitution

(d) Physical makeup

I got this question in examination.

I'd like to ask this question from Physical Properties topic in division The Study of Minerals of Engineering Geology

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Correct choice is (c) Chemical composition and atomic constitution

To explain I would say: Hardness may be defined as the resistance, which a mineral offers to an external deformation action such as scratching, abrasion, rubbing or indentation. Hardness of a mineral depends on its chemical composition and atomic constitution.

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