Six kinds of typical commercial Fe₂O₃ were sampled and divided into two groups A and B. according to the magnetic measurement results. The samples of group A are of susceptibility about 10^-4 and the specific saturation magnetization σs 0.2-0.3 A.M²/kg, being consistent with the feature of antiferromagnetic α - Fe₂O₃. While the samples of group B display strong magnetism with susceptibility 10^-1-10^-2 and σ s 1.7-12 A.M²/kg. Mössbauer spectra of the samples were investigated at room temperature in an external magnetic field. It is suggested there is the γ - Fe₂O₃ phase in the group B according to the relative intensities of spectra I(2,5)/I(3,4). This was proved by the Mössbauer spectra for the mixed samples A with γ - Fe₂O₃ at various contents and by measuring the dependence of specific saturation magnetization on temperature for the samples of group B.