Recovery of potassium as potassium chloride from glauconitic rocks having generalized chemical formula of (K, Na) (Fe3+, Fe2+, Al, Mg)2 (Al, Si)4 O10 (OH)2·nH2O through reduction and redox roasting followed by HCl leaching leads to generation of highly acidic chloride solution containing K as well as Fe. The dissolved iron was present in both the form that is Fe2+ for reduction roasting and Fe3+ for redox roasting. Separation of such iron is one of the major concerns for most of the hydrometallurgical industry. Currently, the most common process for iron removal is precipitating it in the form of jarosite, para-goethite and goethite. However, this process is not suitable due to high alkali consumption, formation of metastable solid and environmental concern related to its disposal. These products don’t have any further application. In order to avoid such complication and recover it as value-added product, the authors has proposed an air oxidative precipitation method for Fe2+ and hydrothermal treatment for Fe3+ recovery from such acidic leach chloride solution. The final product of these processes are nano sized monodispersed magnetite and hematite particles. The synthesized products were characterized through X-ray diffraction (XRD), Scanning electron microscopy (SEM) followed by Energy-dispersive X-ray (EDS), Fourier transform infrared spectroscopy (FTIR) and Vibrating sample magnetometer (VSM) to confirms its suitability for pigment application.