| Mineral hardness index (4,5) |
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| Ranking system where diamond is ten and talc is one (4,5) |
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| Where diamond gets a 10 |
LA Times Daily |
22 Jun 2019 |
| Where diamond gets a 10 |
The Washington Post |
22 Jun 2019 |
| Where diamond gets a 10 |
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| Measuring system of relative hardness of solids |
The Telegraph General Knowledge |
27 Nov 2016 |
| Where a diamond is rated a 10 |
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| Diamond-topped thing |
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| It measures the hardness of a bop to Larry or Curly's head? |
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| Diamond is at one of its extremes |
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| Diamond is at one of its extremes |
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| Hardness measure |
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