During last few years important changes on the Polish market of natural aggregates were occurred. In Lower Silesian region these changes were especially sharply outlined because of exceptional position of it in domestic raw materials economy. In this article changes of resources of Lower Silesian rock raw materials to aggregates production were presented. These analysis were done in relation to the deposits of crushed and dimension stones also sands and gravels ones. Geological and developed reserves were characterized as well as changes of output of these raw materials taking into account growth of their output to 2011 and decrease in the next years. Used also a positive increase in the supply of artificial crushes produced from copper slag in Głogów and Legnica smelters. On this background importance of Lower Silesia region in provide the demand of aggregate product for different parts of the country was underlined.