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Mohs' scale"



Pronunciation: (mōz), [key]
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. Abbr.: MSH

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

Mohorovicic discontinuitymohur
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