To determine the hardness of a concrete surface relative to Mohs’ hardness scale you must perform a scratch test. Start by using the lowest number pick and continue up the scale until the concrete begins to scratch and that is your numeric number of hardness relative to the Mohs’ scale.

1 = Softest 10 = Hardest

1. Talc

2. Gypsum

3. Calcite

4. Fluorite

5. Apatite

6. Feldspar

7. Quartz

8. Topaz

9. Corundum

10. Diamond

Tooling Reference to Mohs’ hardness scale:

2-3: Hard Tooling

3-5: Hard Tooling

5-7: Medium Tooling

7-9: Medium Tooling

Mohs Hardness Tester For Concrete Floor Surface