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Due to the wide variety in the composition of coal, its position on the Mohs hardness would vary based on the type of coal that is measured. However, because coal is not a mineral,...

Mohs scale of mineral hardness


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 ...

Mohs Hardness Scale: Testing the Resistance to Being Scratched


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

Mohs Scale of 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 ...

The Mohs scale is strictly a relative scale, but that's all that anyone needs. In terms of absolute hardness, diamond (hardness 10) actually is 4 times harder than corundum (hardness 9) and 6 times harder than topaz (hardness 8). A fingernail is 2½, a penny (actually,... More »
By Andrew Alden, About.com Guide

Mohs Scale of Hardness - Mineralogical Society of America


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 ...

Mohs hardness | mineralogy | Britannica.com


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 ...

Mohs Hardness Test - Rock, Mineral and Fossil Collections From ...


How to conduct a hardness test on an unknown rock or mineral using Mohs Scale of hardness.

Mohs scale of mineral hardness - New World Encyclopedia


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.

Mohs Hardness Test


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.

Popular Q&A
Q: What is mohs hardness scale?
A: The Mohs scale of mineral hardness characterizes the scratch resistance of various minera... Read More »
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Q: What is a Mohs' hardness scale?
A: it is a geological scale that measures the hardness of different minerals. Talc being the softest and a diamond being the hardest. Read More »
Source: wiki.answers.com
Q: Moh's Hardness Scale?
A: Here's a site which has info about Moh's scale. You can look up the hardness of minerals and household items here. Then you can test your titanium oxide and the... Read More »
Source: answers.yahoo.com
Q: Remembering Mohs hardness scale?
A: The girls can flirt and other queer things can dance. Talc, gypsum, calcite, fluorite (flourspar) apatite, orthoclase (a feldspar) topaz corundum, diamond. This... Read More »
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Q: What is fluorite on the mohs hardness scale?
A: Fluorite is 4 on the Mohs scale. Read More »
Source: wiki.answers.com