Having so many oxides, we can ask ourselves if it is possible to distinguish them by means of the Raman spectroscopy. This spectroscopy is named after the Indian physicist Sir Chandrasekhara Venkata Raman. The technique is based on the vibrational modes of molecules, relying upon the inelastic scattering of photons, that is the Raman scattering. A source of monochromatic light, usually a laser, is providing the photons interacting with molecular vibrations, phonons and other excitations. The outcoming inelastically scattered photons have a shifted frequency, which is giving information about the vibrational modes. The elastically scattered photons, which have a wavelength corresponding to the laser line (Rayleigh scattering), are filtered out. The several iron oxides possess different crystal lattices and symmetries, so phonons and other vibrational modes seem being quite distinguishable, and consequently the Raman spectroscopy appears as a method easy to handle.