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Mohs Hardness Scale

mohs hard·​ness scale | ˈmōz ˈhärd-nəs skāl

noun

A qualitative scale characterizing scratch resistance of various minerals through the ability of harder material to scratch softer material

The Mohs hardness scale ranges from 1 to 10. It includes: Talc (1), Gypsum (2), Calcite (3), Fluorite (4), Apatite (5), Orthoclase (6), Quartz (7), Topaz (8), Corundum (9), Diamond (10).

The scale was created by Friedrich Mohs in 1812.

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