Netvouz / beachschool / tag / mohs http://netvouz.com/beachschool/tag/mohs?feed=rss beachschool's bookmarks tagged "mohs" on Netvouz *Mohs scale of hardness http://www.gwydir.demon.co.uk/jo/minerals/hardness.htm 2nd Grade > Rock hardness beachschool Thu, 01 Jan 1970 00:00:00 GMT *Mohs scale of mineral hardness http://en.wikipedia.org/wiki/Mohs_scale_of_mineral_hardness 2nd Grade > Rock hardness beachschool Thu, 01 Jan 1970 00:00:00 GMT The Mohs Scale of Relative Mineral Hardness http://geology.about.com/library/bl/blmohsscale.htm 2nd Grade > Rock hardness beachschool Thu, 01 Jan 1970 00:00:00 GMT