Moh's Hardness Scale
|
Hardness |
Mineral |
Description |
|
1 |
Talc |
Fingernail scratches it easily. |
|
2 |
Gypsum |
Fingernail scratches it. |
| 3 |
Calcite |
Copper penny scratches it. |
| 4 |
Fluorite |
Steel knife scratches it easily. |
| 5 |
Apatite |
Steel knife scratches it. |
| 6 |
Feldspar |
Steel knife does not scratch it easily, but
scratches glass. |
| 7 |
Quartz |
Hardest common mineral. It scratches steel and glass easily. |
| 8 |
Topaz |
Harder than any common mineral. |
| 9 |
Corundum |
It scratches Topaz. |
| 10 |
Diamond |
It is the hardest of all minerals. |
