The electron microscopic photographs of the surface of amphiboles with miscellaneous diversity of the radical: Si8, Si7, Si6, Si5 demonstrate cleavage deterioration. In this row from ferriwinchite to hastingsite and sadanagaite the content of Al3+ in T(1) site as well as Fe3+ and Al3+ in M(2) site increases, thereby the connections between double tetrahedral chain and octahedral strips, forming the frame of amphibole structure, strengthen.