Mohs Hardness Scale

Front

What is the Mohs Hardness Scale?

Back

A scale that ranks minerals based on their ability to scratch one another, from 1 (softest) to 10 (hardest).

Front

Which mineral is the softest on the Mohs scale?

Back

Talc, with a hardness of 1.

Front

Which mineral is the hardest on the Mohs scale?

Back

Diamond, with a hardness of 10.

Front

What is the hardness of quartz on the Mohs scale?

Back

7.

Front

What is the hardness of talc on the Mohs scale?

Back

1.

Front

What is the hardness of gypsum on the Mohs scale?

Back

2.

Front

What is the hardness of calcite on the Mohs scale?

Back

3.

Front

What is the hardness of fluorite on the Mohs scale?

Back

4.

Front

What is the hardness of apatite on the Mohs scale?

Back

5.

Front

What is the hardness of orthoclase (feldspar) on the Mohs scale?

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6.