Extracted text: The endurance of the rocks to stress depends on the shape of the sample and its size, the degree of cohesion and interconnection between the grains, the pressure direction in relation to the matching direction, the most important mineral components for breeding in general from O sand, silt, calcite clay, gravel, silt sand, breccia, gravel cracking arises in the mineral due to O Outer crushed crystal shape Specific weight *