Mohs' scale

noun
\ˈmōz-, ˈmōs-, ˈmō-səz- \

Definition of Mohs' scale 

: a scale of hardness for minerals that ranges from a value of 1 for talc to 10 for diamond

First Known Use of Mohs' scale

1879, in the meaning defined above

History and Etymology for Mohs' scale

Friedrich Mohs †1839 German mineralogist

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The first known use of Mohs' scale was in 1879

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More Definitions for Mohs' scale

Mohs' scale

noun
\ˈmōz-, ˈmōs-, ˈmō-səz-\

Medical Definition of Mohs' scale 

1 : a scale of hardness for minerals in which 1 represents the hardness of talc; 2, gypsum; 3, calcite; 4, fluorite; 5, apatite; 6, orthoclase; 7, quartz; 8, topaz; 9, corundum; and 10, diamond

2 : a revised and expanded version of the original Mohs' scale which provides finer distinctions between the harder materials and in which 1 represents the hardness of talc; 2, gypsum; 3, calcite; 4, fluorite; 5, apatite; 6, orthoclase; 7, vitreous pure silica; 8, quartz; 9, topaz; 10, garnet; 11, fused zirconium oxide; 12, fused alumina; 13, silicon carbide; 14, boron carbide; and 15, diamond

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