context: Mohs scale is a scale of material hardness used to indicate the ability of different materials to resist scratching.. [1] [2] [3] This is done by examining the ability of a solid to scratch a less solid material. This scale was established in 1812 by the German mineralologist Friedrich Moss. The Mohs scale is a hierarchical scale, that is, it gives the material a specific ranking in the material list and does not give the absolute value of hardness. For example, diamonds that follow the corundum according to the Moh scale, although its hardness is almost four times that of the corundum.
question: What is the Mohs scale?
answers.text: scale of material hardness used to indicate the ability of different materials to resist scratching.