Changes

The '''Mohs hardness scale''' for minerals has been used since 1822,<ref>[http://www.gordonengland.co.uk/hardness/mohs.htm]</ref> having been devised by Friedrich Mohs in 1812. It simply consists of 10 minerals arranged in order from 1 to 10. Diamond is rated as the hardest and is indexed as 10; talc as the softest with index number 1. Each mineral in the scale will scratch all those above it as follows:

The '''Mohs hardness scale''' for minerals has been used since 1822,<ref>http://www.gordonengland.co.uk/hardness/mohs.htm</ref> having been devised by [[Friedrich Mohs]] in 1812. It simply consists of 10 minerals arranged in order from 1 to 10. Diamond is rated as the hardest and is indexed as 10; talc as the softest with index number 1. Each mineral in the scale will scratch all those above it as follows:

#[[Talc]]

#[[Talc]]

#[[Gypsum]]

#[[Gypsum]]

==Reference==

==Reference==

<references/>

<references/>

[[Category:Geology]]

[[Category:Geology]]

[[Category:Minerals]]

[[Category:Minerals]]