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Hardness Scale (1 (Talc), 2 (Gypsum), 4 (Fluorite), 6 (Feldspar), 8…
Hardness Scale
1
Talc
2
Gypsum
4
Fluorite
6
Feldspar
8
Topaz
10
Diamond
3
Calcite
5
Apatite
9
Corundum
7
Quarts