Definition of Mohs' scale in English:

Mohs' scale


  • A scale of hardness used in classifying minerals. It runs from 1 to 10 using a series of reference minerals, and position on the scale depends on ability to scratch minerals rated lower.

    ‘Scratch hardness is measured according to the Mohs' scale.’
    • ‘So a quick application of Mohs' scale of hardness to the base of the item, using a pocket knife, was employed to satisfy my friend's curiosity.’
    • ‘On Mohs' scale a finger nail is 2.5; a copper coin 3.5; a knife blade 5.5; and a metal file 6.5-7.’


Mohs' scale

/ˈmōz ˌskāl/ /ˈmoʊz ˌskeɪl/ /ˈmōs ˌskāl/ /ˈmoʊs ˌskeɪl/


Late 19th century named after Friedrich Mohs, (1773–1839), German mineralogist.