The present study is in line with sustainability and environmental issues regarding the utilization of local materials and wastes for developing silicate ceramics in RCA (Central African Republic). Two clay deposits were selected for this purpose and noted NZ1 and KO. Their chemical and mineralogical analyses revealed the presence of major clay mineral phases as kaolinite and illite; while quartz, and iron oxide/hydroxide phases were detected as secondary crystalline phases. The use of Winkler and chemical composition diagrams, according to the results of chemical analysis and granulometry of these clay materials, indicated their suitability as starting materials for the manufacture of earthenware ceramics.