Minerals Hardness Scale Worksheets
Minerals Hardness Scale()

Minerals Hardness Scale

The hardness scale was developed in 1812 in order to make comparison of different types of rocks and minerals. The scale ranges from 1 being talc, to 10 being diamond. When we scratch rocks with different things we can determine its hardness.

Should a finger nail be able to scratch the diamond or should the diamond be able to scratch a finger nail? Explain.

Look at the scale and decide what two things would be able to scratch glass. Explain your answer.

What should a copper penny be able to scratch? Why do you think so?

Should a finger nail be able to scratch glass? Why or why not?

If you were to test a piece of chalk and decide where on the scale it should be, what could you use to do a scratch test on it? (Chalk used to be made of sedimentary rock—soft limestone). What number might chalk be? Test it and find out if you are correct.

*Hardness is one of the properties of rocks and minerals.

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