Abstract : The current work investigates the potential use of complex clay deposits for geopolymer production. The used deposits, as well as the final product, were both characterized. The results indicated a higher plasticity limit, bulk density, and silica content for the studied clay deposit than the pure de-posits due to multiple clay minerals. The maximum given compressive strength was 8.69 MPa at a 1.5 ratio of Na2SiO3/NaOH, with water absorption of about 7%. The mineralogical and microstruc-tural analysis of the product reveals the formation of the hydroxysodalite phase and gel phase, with high amounts of unreacted components. As a result, it is strongly advised to utilize complex clay deposits to reduce the amount of aluminosilicate materials needed in geopolymer production.