Mohs Scale

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    A loose scale of hardness, used for field collecting, which allows for identification of specimens. Devised by Friedrich Mohs, a German mineralogist, in the 19th century. The comparative scale of hardness is as follows:
    1) Talc
    2) Gypsum
    3) Calcite
    4) Fluorite
    5) Apatite
    6) Feldspar
    7) Quartz
    8) Topaz and Beryl
    9) Corundum
    10) Diamond

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