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General Information, Facts & Tables
[Mohs Hardness Scale]

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Overview

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Moh's Hardness scale is a range between 1 and 10

Moh's Hardness Scale

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Hardness

Mineral

Test

1

Talc

Crushed by fingernail

2

Gypsum

Scratched by fingernail

3

Calcite

Scratched by copper coin

4

Fluorspar

Scratched by glass

5

Apatite

Scratched by knife blade

6

Feldspar

Scratched by quartz

7

Quartz

Scratched by steel file

8

Topaz

Scratched by corundum

9

Corundum

Scratched by diamond

10

Diamond

No test