(...) In addition to ongoing investigations describing the occurrence and geological nature of the raw material, determination of the number of levels at which the raw material occurs in the limestone, and the stratigraphic context and geological dating of the layers, a principal goal is to identify instrumental method/methods for accurately distinguishing siliceous rocks and applying the results in archeological studies. The cooperation between archeologists and geologists started by Krukowski and Samsonowicz continues and the collection of studies presented here are the latest results of those cross-disciplinary cooperative efforts directed to understanding the origin, occurrence and characteristics of siliceous rocks, and their exploitation and conveyance by prehistoric communities. [From Editorial]