Abstract: Wear resistance of rock aggregate against micro-cutting was tested for five different types of rocks (granite, basalt, marble, limestone and dolomite) and their relations to rock properties were analyzed. Results indicate that granite has the highest resistance that is 13 times that of dolomite, followed by basalt of 5 times, then by marble, limestone and dolomite. The resistance is related to Vickers micro-hardness to a certain extent, but no simple relation between these two parameters has been found in this study. Mineral composition and pore structure of the rocks are major factors of the resistance; size and morphology of the mineral grains also have a certain influence on the resistance.