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

What mineral is ranked as 1 on the Mohs Hardness Scale?

Back

Talc, the softest mineral.

Front

What mineral is ranked as 10 on the Mohs Hardness Scale?

Back

Diamond, the hardest mineral.

Front

What does it mean if a mineral can scratch another mineral?

Back

It means the first mineral is harder than the second mineral according to the Mohs Hardness Scale.

Front

Which mineral can scratch quartz?

Back

Topaz can scratch quartz.

Front

What mineral can be scratched by a steel nail?

Back

Gypsum can be scratched by a steel nail.

Front

What is the hardness of fluorite on the Mohs Hardness Scale?

Back

Fluorite is ranked 4 on the Mohs Hardness Scale.

Front

Which mineral cannot be scratched by a masonry drill bit?

Back

Corundum cannot be scratched by a masonry drill bit.

Front

What mineral can scratch fluorite but not orthoclase?

Back

Apatite can scratch fluorite but not orthoclase.

Front

What is the hardness of quartz on the Mohs Hardness Scale?

Back

Quartz is ranked 7 on the Mohs Hardness Scale.