🪨 Material Science Tools
Mohs hardness reference chart for common minerals (1–10). For Rockwell, Vickers, or Brinell conversions, use manufacturer tables.
Mohs Hardness Reference
Open tool: Mohs Hardness Reference
Mohs hardness reference chart for common minerals (1–10). For Rockwell, Vickers, or Brinell conversions, use manufacturer tables.
Open tool: Mohs Hardness Reference
Apatite
Mohs hardness: 5
Glass ~5.5
| Mohs | Mineral | Reference |
|---|---|---|
| 1 | Talc | Softest; scratched by fingernail |
| 2 | Gypsum | Scratched by fingernail |
| 2.5 | Calcite | Scratched by copper coin |
| 4 | Fluorite | Scratched by knife |
| 5 | Apatite | Glass ~5.5 |
| 6 | Orthoclase | Scratched by steel file |
| 7 | Quartz | Scratches glass |
| 8 | Topaz | Scratches quartz |
| 9 | Corundum | Scratches topaz |
| 10 | Diamond | Hardest natural mineral |