Mohrs hårdhedsskala

Ordinal Mohs’ hardness scale with minerals in boxes with a hardness of 1-10. The mineral in level 10, diamond, is included as a diamond tool.

The set includes:
1. Talk
2. Gypsum
3. Calcite
4. Fluorite
5. Apatite
6. Orthoclase
7. Quartz
8. Topaz
9. Corundum
10. Diamond tool