The Mohs hardness scale is a measure of the relative hardness of minerals. It is based on the ability of one mineral to scratch another. The scale ranges from 1 to 10, with 1 being the softest and 10 being the hardest. The numbers on the scale correspond to the following minerals:

1: Talc

2: Gypsum

3: Calcite

4: Fluorite

5: Apatite

6: Orthoclase feldspar

7: Quartz

8: Topaz

9: Corundum

10: Diamond

In addition to the number rating, each mineral on the Mohs hardness scale also has a corresponding mineral name. This helps to provide a more specific reference for the hardness of a particular mineral.