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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

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.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.gemselect.com/gem-info/gem-hardness-info.php

Sep 16, 2006 ... Mohs scale of hardness is used to measure a gems resistance to scratching. Learn which gemstones are the hardest and best for rings and ...

www.gemrockauctions.com/learn/technical-information-on-gemstones/mohs-hardness-scale-for-gemstones

Feb 26, 2012 ... The MOHS scale of hardness is universally used when describing gemstones. But what does it mean and how can you use it help protect your ...

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.