Mohs or Mohs' scale «mohz»,
1. a scale for classifying the relative hardness of minerals, as follows: talc 1; gypsum 2; calcite 3; fluorite 4; apatite 5; feldspar 6; quartz 7; topaz 8; corundum 9; diamond 10.
2. a modified form of this scale, arranged as follows: talc 1; gypsum 2; calcite 3; fluorite 4; apatite 5; orthoclase 6; vitreous silica 7; quartz 8; topaz 9; garnet 10; fused zirconia 11; fused alumina 12; silicon carbide 13; boron carbide 14; diamond 15.
╂[< Friedrich Mohs, 1773-1839, a German mineralogist, who invented it]
Useful english dictionary. 2012.