X1011662984-00134-37706</DOCNO> Mohs hardness scale Mohs hardness scale Mineral Hardness Talc 1 Gypsum 2 Calcite 3 Fluorite 4 Apatite 5 Orthoclase 6 Quartz 7 Topaz 8 Corundum 9 Diamond 10 Note: the Mohs hardness scale is a relative scale in ten steps (scratch hardness), with which the next harder mineral cuts the preceding, softer mineral.
(the Mohs hardness scale; is; a relative scale in ten steps) (the next harder mineral; cuts; the preceding)
the Mohs hardness scale the next harder mineral
is cuts
a relative scale in ten steps
the preceding