Earthguide.table
Moh's scale of mineral hardness

 

...
Ranking
Mineral
Natural form
Form of usage
Softest
1
Talc
...
...
...
2
Gypsum
...
...
...
3
Calcite
...
...
4
Fluorite
...
...
...
5
Apatite
...
...
...
6
Feldspar
...
...
...
7
Quartz
...
...
...
8
Topaz
...
...
...
9
Corundum
...
...
Hardest
10
Diamond
...
...

 

Earthguide

 
©1999, 2000 by the Regents of the University of California.
All rights reserved.