Medina Rocks and Minerals - Moh's scale of Mineral Hardness
The softest mineral on Moh's scale is Talc
1
The hardest mineral on Mohs' scale is diamond.
10
Of the minerals listed on Mohs' scale, gypsum can scratch only talc
2
Quartz and calcite can look similar. In a field test, a copper penny could be used to scratch calcite. However, the same penny could not scratch quartz
3
Fluorite cannot scratch apatite, but it can scratch talc, gypsum, and calcite.
4
Apatite can scratch fluorite, calcite, talc, and gypsum.
5
Feldspar can only scratch glass
6
Quartz is slightly harder than feldspar. Both minerals can scratch glass, but only quartz can scratch steel
7
Topaz can scratch all minerals on Mohs' scale, except for corundum and diamond
8
Corundum can scratch all of the minerals on Mohs' scale, except diamond
9