Step-by-step explanation:
Mohs scale is defined as a scale which distinguishes minerals on the basis of its hardness.
Minerals which are classified with the help of this scale are placed from 1 to 10. The hardness of minerals increases with increase in number at which they are placed.
For example, talc is placed at number 1 and diamond is placed at number 10.
This shows that diamond is the hardest mineral present and it does not get a scratch.
Therefore, we can conclude that the name of the commonly used hardness scale is Mohs scale.