Mohs Scale
From Geology Wiki
The Mohs Scale is a scale that measures hardness of solid objects, mainly rocks and minerals. A mineralogist named Friedrich Mohs invented it in 1812.
The original scale is below:
| Mineral Name | Hardness |
|---|---|
| Talc | 1 |
| Gypsum | 2 |
| Calcite | 3 |
| Fluorite | 4 |
| Apatite | 5 |
| Orthoclase Feldspar | 6 |
| Quartz | 7 |
| Topaz | 8 |
| Corundum | 9 |
| Diamond | 10 |
