Clay minerals are widely used in cosmetic products as of suspensions and emulsions. Suspensions are stabilized with stabilizing agents (electrolytes), but emulsions - with surfactants (usually molecules with both polar and non-polar groups) and solid particles. Application of solid particles instead of surfactants is attractive to production of cosmetic and pharmaceuticals due to possible harmful effect on human. The addition of clay minerals to suspensions and emulsions improve their stability. From clay minerals montmorillonite, kaolinite, laponite and paligorskite are mostly investigated and used, but research show that illite containing clay minerals also can stabilize oil-in-water emulsion. Stability of suspensions and oil-in-water emulsions containing illitic clays was investigated.