Mohs Scale of Hardness


Mineral Properties

HARDNESS MINERAL COMMON EXAMPLE
1 Talc Pencil lead 1.0-2.0
2 Gypsum Fingernail 2.5
3 Calcite Copper penny 3.5, brass
4 Fluorite Iron
5 Apatite Tooth enamel, knife blade, glass 5.5-6.0
6 Orthoclase Steel file 6.5
7 Quartz Scratches glass
8 Topaz ------
9 Corundum Saphire, ruby
10 Diamond Synthetic diamond


Mineral Properties
(c) Department of Civil and Geological Engineering, University of Saskatchewan, 57 Campus Drive, Saskatoon, SK, Canada, S7N 5A9