Abstract: In this research, duplex ceramic coatings were deposited on Al 6061 alloy, using anodizing and Micro Plasma process (MPO). MPO electrolyte was modified using hydroxy apatite and 15 g L^–1 rock additives rich with Calcium Carbonate (CaCo₃). Phase composition of the coatings, micro structure, micro-hardness, topography, thickness, roughness and wear resistance were evaluated by X-Ray Diffraction (XRD), (SEM), a Vickers indenter, AFM and Microprocessor coating thickness meter, roughness test and Micro test, respectively. Results showed that the samples coatings contained γ-alumina and their thickness and hardness increased by the increasing of deposition time. The research demonstrates that a relatively hard, thick and uniform coatings with good wear resistance, can successfully be deposited on Al alloy using hydroxy apatite and 15 g L^–1 CaCo₃ rock additives containing electrolytes as an natural rock additives.