Lecture 1. Material Properties 1. Background

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One of the earliest is the Mohs scale, which lists 10 materials (diamond = hardest := 10, and talc = softest := 1). If a material has Mohs hardness = n, then it should be able to put a scratch on all materials below hardness n, and not on any materials above harness n+1. It is usually used

  Scale, Properties, Hardness, Mohs, Mohs scale, Mohs hardness