A rare earth (REEs) and Zn ore martial belonging to a poly-metallic mineralization of Abu Rushied area, Southern Eastern Desert of Egypt is subjected to mineralogical analysis and acid leaching. The former proved that both Zn (assaying 5%) and REEs (assaying 3.1%) are found adsorbed upon the iron oxide mineral goethite (equivalent to 15 % Fe₂O₃). Acid leaching studies using sulphuric acid defined the optimum conditions for dissolving about 94% of Zn and 92.5% of REEs. Besides being a powerful oxidizing agent and can create chloric acid, NaClO₃ was incorporated in the leaching process to decrease the required input sulphuric acid. In addition, NaClO₃ adequate Na₂SO₄ that could be used in the early precipitation of the (light REEs)LREEs as their double sulphates.