Nanoparticles of hematite were prepared by the precipitation method. Structural, hysteresis, moment-temperature, ferromagnetic resonance tests were performed. All hematite peaks were appeared in the XRD pattern with corundum phase of crystallite size of 15 nm. The SEM images showed that the average particle size is around 21 nm with ribbed shape. Different Fe–O bond peaks were registered in the FTIR test. The sample showed weak ferromagnetic state as was checked by M-H and M-T tests. The M-H test showed opened loop at low-field region and linear behavior at high-field region with susceptibilities of 1.4 × 10−5 emu/g Oe and 7.5 × 10−6 emu/g Oe respectively. Fitting by Langevin equation is conducted to find the particle moment. Morin temperature was found to be 17.77 K, while Neel temperature was about 614 K. A comparison with literature was given. FMR test showed a shift in the resonance field with broadened line having Lande g factor of 1.90498 at 9.3 GHz.