MOH’S HARDNESS SCALE Rules for testing and identifying the hardness of minerals.

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Presentation transcript:

MOH’S HARDNESS SCALE Rules for testing and identifying the hardness of minerals

How it works Hardness is the resistance of a mineral to scratching. Hardness IS NOT how easily a mineral is broken. We determine the RELATIVE hardness of minerals using a scale called the Moh’s hardness scale. The scale assigns hardness to 10 common index minerals based on their ability to scratch one another.

The Important Part Moh’s Hardness ScaleItems used for testing

1 Talc

2 Gypsum

2.5 Fingernail

3 Calcite

3.5 Penny

4 Fluorite

4.5 Nail

5 Apatite

5.5 Glass

6 Feldspar

6.5 Steel File

7 Quartz

7 Streak Plate

8 Topaz

9 Corundum

10 Diamond