Mohs Hardness Scale of Minerals

Minerals are defined by five criteria: 1. Naturally Occurring, 2. Inorganic, 3. Solid, 4. Defined Chemical (Atomic) Formula, and 5. A unique set of physical properties.

What are the ten internationally recognized minerals of the Mohs Hardness Scale?

1. Talc

2. Gypsum

3. Calcite

4. Flourite

5. Apatite

6. Feldspar (Orthoclase)

7. Quartz

8. Topaz

9. Corundum

10. Diamond

Click here to see my mineral teaching display.