The anisotropy of the magnetic susceptibility was investigated along a traverse from the macroscopically isotropic central granite to the peripheral gneissic parts of the Askersund granite-gneiss complex. Increase in the degree of the anisotropy of the magnetic susceptibility (P J ) from low values in the central part to increasingly higher values towards the periphery corresponds to a differentiation of the rocks into a granite (P J < 1.15), a transitional granitoid (1.15 < P J < 1.25), and a gneiss (1.25 < P J ). In the gneiss, the coercivity becomes strongly linearly dependent upon the increasing degree of the anisotropy of the magnetic susceptibility.