Mohs hardness scale
Mineral name Value
Talc - Mg3Si4(OH)2 1
Gypsum - CaSO4-2(H2O) 2
Calcite - CaCO3 3
Fluorite - CaF2 4
Apatite - Ca5(PO4)3(OH,F,Cl) 5
Orthoclase - KAlSi3O8 6
Quartz - SiO2 7
Topaz - Al2SiO4(F,OH)3 8
Corundum - Al2O3 9
Diamond - C 10


















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