Mohs Scale of Harness
What is the Mohs Scale of Hardness?
The Mohs scale of mineral hardness is a scale characterising the scratch resistance of various minerals through the ability of a harder material to scratch a softer material.

How did the Mohs Scale come about?
The Mohs’ hardness scale was developed in 1822 by Frederich Mohs. This scale is a chart of relative hardness of the various minerals (1 – softest to 10 – hardest).