What is the Mohs Scale of Hardness?

- Oct 04, 2018-

Mohs scale of hardness is a scale for measurement of the proportionate hardness of a gemstone determined by its resistance to scratching. The softest metal (talc) rates 1 on the scale while the hardest (diamond) scores 10. The scale takes this name after its inventor a German mineralogist known as Friedrich Moh.