The paper describes the domestic market for feldspar raw materials and its relation to the ceramic tile sector. The most important features that influenced the volume of feldspar domestic supply since the mid-1990s have been discussed. The most important phenomenon among them has been the sharp increase of ceramic tile supply from the domestic manufacturers. That has followed the growth of domestic economy and large investments in the ceramic tile sector, which capacities has recently exceeded 90 M m2 per annum. The crucial change in the assortment of tiles domestically manufactured has been the introduction of a new type of tile to the market, i.e. a gres porcellanato, which is characterised by the increased sintering followed by high content of fluxes (feldspar) in the ceramic body. The product present high mechanical and technical qualities, i.e. peculiar abrasion resistance, high surface hardness and extremely low porosity (less than 0.1% of water absorption). The production of gres porcellanato tiles, which has been developed by the leading manufacturers in the world, seems to be the most important factor influencing the future feldspar consumption in Poland. However, the increase in demand will depend on the situation in the construction industry that is conditioned by tendencies in the domestic economy.