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In a test of hardness, _____ will scratch _____. corundum, diamond talc, gypsum quartz, apatite gypsum, calcite

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SilverInspiration
quartz will scratch apatite. I know that for a fact.
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Answer is: quartz will scratch apatite.

Friedrich Mohs devised a scale that tested mineral hardness, which means the resistance of a mineral to being scratched. This scale (from 1 to 10) is known as the Mohs Hardness Test.

Quartz has Mohs hardness 7 and apatite 5, so quartz is harder.

Diamond has hardness 10 and corundum 9.

Talk has hardness 1 and gypsum 2.

Calcite has Mohs hardness 3.

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