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Chapter: 2 General physics
    Section: 2.2 Mechanical properties of materials
        SubSection: 2.2.6 Moh’s scale of mineral hardness
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2.2.6 Mohs′s scale of mineral hardness

The numbers are not quantitative but merely indicate the sequence of hardness.

Mineral

Hardness

Mineral

Hardness

Mineral

Hardness

 

 

 

 

 

 

Talc     .    .    .    .    .

1

  Apatite    .    .    .    .

5

  Corundum    .    .    .

9

Rock salt  .    .    .    .

2

  Felspar    .    .    .    .

6

  Diamond      .    .    .

10  

Calcspar    .    .    .    .

3

  Quartz    .    .    .    .

7

 

  

Fluorspar .    .    .    .

4

  Topaz     .    .    .     .

8

  Finger-nail   .    .    .

~2.5

 

 

 

 

  Penknife      .    .    .

~6.5

 

 

 

 

 

 

E.F.G.Herington

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