The objectives of this research are synthesize magnetic nanoparticles, analyze the effect of Mn dopant variations on hematite and discuss the magnetic properties of hematite nanoparticles from natural sand in the village of Logas, Kuansing Regency, Riau Province. This study used a 2-stage ball milling method for 120 hours. The ball miling sample was then doped with Mn with a concentration …