"MOH'S SCALE OF HARDNESS"
Compliments of
The International Gem Society
|
10 |
Diamond |
|
9 |
Corundum |
|
8 |
Topaz |
|
7 |
Quartz |
|
6 |
Feldspar |
|
5 |
Apatite |
|
4 |
Fluorite |
|
3 |
Calcite |
|
2 |
Gypsum |
|
1 |
Talc |
Last Update: November 16, 2007