What Determines A Minerals Cleavage And Hardness?

What Determines A Minerals Cleavage And Hardness? Crystal form What determines a minerals hardness? Hardness is determined by the ability of one mineral to scratch another. Federick Mohs, a German mineralogist, produced a hardness scale (table 5) using a set of ten standard minerals. The scale arranges the minerals in order of increasing hardness. What