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Earth Sciences 9 Online
OpenStudy (anonymous):

How is hardness defined when identifying minerals?

OpenStudy (anonymous):

hardness is identified by the minerals ability to scratch and to be scratched. (can it scratch other objects or minerals or can it be scratched by other minerals.)

OpenStudy (e.mccormick):

They ususally use the mohs scale for harness. This is a comparitive scale where the buy tried rubbing things together to see what scratched what ahd determoined several key items at different hardness steps. http://www.amfed.org/t_mohs.htm

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