单词	Mohs' scale
释义	Mohs' scale noun ˈmōz-  ˈmōs-  ˈmō-səz- : a scale of hardness for minerals that ranges from a value of 1 for talc to 10 for diamond Word History Etymology Friedrich Mohs †1839 German mineralogist First Known Use 1879, in the meaning defined above Medical Definition Mohs' scale noun ˈmōz-  ˈmōs-  ˈmō-səz- 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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