The Mohs Scale is a scale that measures the hardness of solid objects. Generally, it is used in geology to measure the hardness of rocks and minerals. The scale was created by mineralogist Friedrich Mohs. The Original table used 10 minerals to be each level of hardness.

The original scale is below:

Mineral Name Hardness
Talc 1
Gypsum 2
Calcite 3
Fluorite 4
Apatite 5
Feldspar 6
Quartz 7
Topaz 8
Corundum 9
Diamond 10