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Mineralogical hardness

You can view data for three different hardnesses.

Hardness ranges on scale from 1 to 10 and mineralogical hardness depends upon the ability of a material to scratch another.

image showing Mineralogical hardness: group 13 periodicity for group 13 chemical elements


Moh scale


The scale is roughly logarithmic, that is, a material with a hardness of 8 is roughly 10 times as hard as another material whose hardness is 7, which in turn is 10 times as hard as a material whose hardness is 6, and so on. The minerals chosen by Moh for this scale are:

Literature sources

  1. G.V. Samsonov (Ed.) in Handbook of the physicochemical properties of the elements, IFI-Plenum, New York, USA, 1968.