Mohs Hardness Scale

What is the hardest mineral?

• Talc

• Diamond

• Gypsum

• Topaz

What is the softest mineral?

• Talc

• Diamond

• Gypsum

• Topaz

What two minerals can a fingernail scratch? (Choose 2)

• Talc

• Gypsum

• Calcite

• Fluorite

Which of these can scratch quartz?

• Steel Nail

• Apatite

• Topaz

• Penny

True or False: Glass can scratch orthoclase?

• True

• False

True or False: Corundum can scratch a copper penny?

• True

• False

According to the chart, which is harder apatite or fluorite?

• Apatite

• Fluorite

Which can a masonry drill bit not scratch?

• Gypsum

• Fluorite

• Quartz

• Corundum

Which mineral can scratch fluorite, but not orthoclase?

• Calcite

• Apatite

• Quartz

• Topaz

You can scratch glass with this mineral-

• Orthoclase

• Apatite

• Fluorite

• Calcite