Mohs se hardheidskaal: Verskil tussen weergawes

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Jcwf (besprekings | bydraes)
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Jcwf (besprekings | bydraes)
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Lyn 46:
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| align="center" | 9
| [[korundum|Korund]] ([[Al]]<sub>2</sub>[[O]]<sub>3</sub>)
| align="center" | 400
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