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2. Mohs scale - Wikipedia

   en.wikipedia.org/wiki/Mohs_scale

   Mohs hardness kit, containing one specimen of each mineral on the ten-point hardness scale. The Mohs scale (/ m oʊ z / MOHZ) of mineral hardness is a qualitative ordinal scale, from 1 to 10, characterizing scratch resistance of minerals through the ability of harder material to scratch softer material.

3. Hardnesses of the elements (data page) - Wikipedia

   en.wikipedia.org/wiki/Hardnesses_of_the_elements...

   Mohs scale of mineral hardness; Mohs hardness of materials (data page) Vickers hardness test; Brinell scale This page was last edited on ...

4. List of mineral tests - Wikipedia

   en.wikipedia.org/wiki/List_of_mineral_tests

   The Mohs Hardness Scale is the main scale to measure mineral hardness. Finger nail is 2.5, copper coin is 3.5, glass is 5.5 and steel is 6.5. Hardness scale is Talc is 1, Gypsum is 2, Calcite is 3, Fluorite is 4, Apatite is 5, Orthoclase Feldspar is 6, Quartz is 7, Topaz is 8, Corundum is 9 and Diamond is 10. Odor; Not always recommended.

5. Hardness scales - Wikipedia

   en.wikipedia.org/wiki/Hardness_scales

   The Mohs scale of mineral hardness; The Vickers hardness test; ... Hardness scales may also refer to: Methods of measuring the deposit formation by hard water.

6. Talk:Mohs scale - Wikipedia

   en.wikipedia.org/wiki/Talk:Mohs_scale

   One gives a "steel nail" as 5.5, and the other gives a "steel needle" as 6.5. ... The table including the 10 materials used to define the Mohs hardness scale includes ...

7. Hardness - Wikipedia

   en.wikipedia.org/wiki/Hardness

   When testing coatings, scratch hardness refers to the force necessary to cut through the film to the substrate. The most common test is Mohs scale, which is used in mineralogy. One tool to make this measurement is the sclerometer. Another tool used to make these tests is the pocket hardness tester. This tool consists of a scale arm with ...

8. Orthoclase - Wikipedia

   en.wikipedia.org/wiki/Orthoclase

   Orthoclase is one of the ten defining minerals of the Mohs scale of mineral hardness, on which it is listed as having a hardness of 6. NASA 's Curiosity rover discovery of high levels of orthoclase in Martian sandstones suggested that some Martian rocks may have experienced complex geological processing, such as repeated melting.

9. Sepiolite - Wikipedia

   en.wikipedia.org/wiki/Sepiolite

   Mohs scale hardness: 2: Luster: Dull, earthy: Streak: ... Due to the fact it can be readily scratched with the finger nail, its hardness is ranked at about 2 on the ...