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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 scratch softer material. Created in 1812 by German geologist and mineralogist Friedrich Mohs, it is one of several definitions of hardness in materials science, some ...

simple.wikipedia.org/wiki/Mohs_scale_of_mineral_hardness

Mohs scale of mineral hardness is named after the scientist, Friedrich Mohs, who invented a scale of hardness based on the ability of one mineral to scratch another. Rocks are made up of one or more minerals. According to the scale, Talc is the softest: it can be scratched by all other materials. Gypsum is harder: it can ...

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

Mohs Scale of Mineral Hardness. 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 were common or readily available. The scale is not a linear scale, but somewhat arbitrary.

www.geologypage.com/2016/04/mohs-hardness-scale.html

Apr 6, 2016 ... The Mohs scale of mineral hardness is a qualitative ordinal scale that characterizes the scratch resistance of various minerals through the ability of a harder material to scratch a softer material. It was created in 1812 by the German geologist and mineralogist Friedrich Mohs and is one of several definitions ...

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 scratching, measured by scratching the mineral against another substance of known hardness on the Mohs Hardness Scale. This graphic outlines the index ...

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 - hardest). Since hardness depends upon the crystallographic direction (ultimately on the strength of the bonds between atoms in a crystal), there can be variations in ...

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

During the early 1800s, a German mineralogist named Friedrich Mohs devised a scale that tested mineral hardness, which means the resistance of a mineral to being scratched. 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 ...

www.zephyrus.co.uk/mohshardnessscale.html

ROCKS AND MINERALS. Did you know that the hardness of rocks and minerals is measured on a scale called. MOHS' HARDNESS SCALE. This shows that the hardness of minerals ranges from 1 - 10. The softest is shown with a hardness of 1 - the hardest is 10. Your fingernail has a hardness of about 2.5 and a knife ...