The clays available in the district Şile are coarse grained in terms of its carbon constituents and, may be easily enriched by means of washing and screening methods. Refractory clays available on at the base of the clay stack formed as a result of the decomposition of the main rock enriched with organic acids are used for the production of fire bricks; the clays with a lower ratio of Fe2O3 and higher level of plasticity available at the bottom of the clay stack and between the lower coals and upper coals are used for the production of insulators and also of the granites-ceramics if it has sufficient reserves; the clays available in this region are also used for floor tiles and wall tiles due to their lower content of coal and colors at higher temperatures, as well as for the insulators and vitrifications due to their changing qualities.