Mohs Hardness Scale Questions

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

What mineral is the softest on the Mohs Hardness Scale?

Back

Talc, which has a hardness rating of 1.

Front

What mineral is harder than talc but softer than calcite?

Back

Gypsum, which has a hardness rating of 2.

Front

What mineral is harder than gypsum but softer than fluorite?

Back

Calcite, which has a hardness rating of 3.

Front

What mineral can scratch fluorite?

Back

Apatite, which has a hardness rating of 5.

Front

If a mineral is not scratched by corundum, what is its hardness rating?

Back

10, meaning it is diamond.

Front

Can a penny scratch fluorite?

Back

No, a penny cannot scratch fluorite.

Front

What is the hardness rating of fluorite?

Back

Fluorite has a hardness rating of 4.

Front

What mineral has a hardness rating of 6?

Back

Orthoclase, which is also known as feldspar.

Front

What is the hardest mineral on the Mohs Hardness Scale?

Back

Diamond, which has a hardness rating of 10.