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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 ... The effects of high hardness are important in many fields. Abrasives are ...

www.britannica.com/science/Mohs-hardness

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

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.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 ...

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.bestcrystals.com/mohs-hardness-scale

Mohs Hardness Scale. The hardness of a stone is one of the properties that contribute to identification. Hardness is also an attribute which is important to be ...

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 ...