- a scale of hardness used in mineralogy. Its degrees, in increasing hardness, are: talc 1; gypsum 2; calcite 3; fluorite 4; apatite 5; feldspar 6; quartz 7; topaz 8; sapphire 9; diamond 10. Abbreviation: MSH
- a scale for expressing the hardness of solids by comparing them with ten standards ranging from talc, with a value of 1, to diamond, with a value of 10
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