Obsidian, flint, silicates, radiolarite and green and white quartz were used, while obsidian (probably from Melos) was preferred. 
Most of the tools were produced by using core-reduction. Nuclei were rarely found, but the few finds indicate bipolar nuclei that produced elongated flakes. Only 2% of the blades were produced by percussion, blades produced by pressure technique are only verified to a slight extent. The tools are sparsely standardized and have denticulated or regular cutting edges. 
Parallels can be found on the Greek Mainland in the Franchthi-Cave.