Mineral Properties. GLY 4200 - Lecture 2 –Fall, 2014. Hardness. Hardness may be measured in several ways Moh’s scale – developed by Austrian mineralogist Friedrich Mohs in 1824 Absolute scales – Brinell, Knoop, Rockwell, Vicker’s. 1 Talc 2 Gypsum 3 Calcite 4 Fluorite Apatite.
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GLY 4200 - Lecture 2 –Fall, 2014