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en.wikipedia.org/wiki/Mohs_scale_of_mineral_hardness

The Mohs scale of mineral hardness is a qualitative ordinal scale characterizing scratch resistance of various minerals through the ability of harder material to ...

geology.com/minerals/mohs-hardness-scale.shtml

The most commonly used test of mineral hardness is Mohs Hardness Scale.

www.amfed.org/t_mohs.htm

In 1812 the Mohs scale of mineral hardness was devised by the German mineralogist Frederich Mohs (1773-1839), who selected the ten minerals because they ...

www.minsocam.org/msa/collectors_corner/article/mohs.htm

The Mohs' hardness scale was developed in 1822 by Frederich Mohs. This scale is a chart of relative hardness of the various minerals (1 - softest to 10 ...

www.britannica.com/science/Mohs-hardness

Apr 19, 2017 ... Mohs hardness: rough measure of the resistance of a smooth surface to scratching or abrasion, expressed in terms of a scale devised (1812) ...

www.oakton.edu/user/4/billtong/eas100lab/hardness.htm

This scale, which ran from 1 to 10, was named after Mohs, and is known as the Mohs Hardness Test. (Hardness should not be confused with brittleness.

www.newworldencyclopedia.org/entry/Mohs_scale_of_mineral_hardness

The Mohs scale of mineral hardness characterizes the scratch resistance of various minerals through the ability of a harder material to scratch a softer material.

www.gemologyonline.com/mohs.html

Mohs Scale was developed in 1812 by German mineralogist Friedrich Mohs ( 1773-1839) Mohs Scale of hardness is a RELATIVE scale, not proportional. I mean ...

www.nps.gov/articles/mohs-hardness-scale.htm

Mar 7, 2017 ... The Mohs Hardness Scale is used as a convenient way to help identify minerals. A mineral's hardness is a measure of its relative resistance to ...

www.kidsloverocks.com/html/friedrich_mohs.html

Friedrich Mohs. Every mineral collector should know about the Mohs' Scale of Hardness and the mineralogist who developed it. The scale is a list of minerals ...