There is a transition from band insulator to metal to Mott insulator with increasing number of d electrons in the transition metal oxides. In the (V1-xCrx)2O3 system a Mott transition occurs near x = 0.01. At high temperatures V2O3 and (V.99Cr.01)2 O3 are found to have similar resistivities and temperature coefficients of resistivity. Magnetic susceptibility and electrical resistivity measurements on V2O3+x show that the antiferromagnetic insulating state is suppressed by excess oxygen at x ≈ 0.03-0.04. It is pointed out that trivalent impurities stabilize the insulating state whereas predominantly non-trivalent ions favor the metallic state.