Infrastructure works worldwide move a large part of the economy. Works such as hydraulic dams, bridges that cross fresh and salt water, and buildings in areas of high seismic threat require a material with physical and chemical characteristics that generate great resistance, which guarantees durability and good behavior over time. Concrete resists atmospheric conditions and natural events, making it attractive for construction. This research work aimed to analyze one of the constitutive elements of the mixture that contribute to the resistance of the concrete, the analysis of the stone aggregates, and the size of the gravel according to physical parameters such as hardness, fracture, texture, roundness, and sphericity, to determine the variation in the resistance of the concrete. The methodology used systematically began in a first phase with the separation of the different types of rocks that are part of the crushed material. In a second phase, it was separated, and the percentage was determined according to the type of rock selected, which were four types of igneous rocks: andesites, dacites, granodiorites, and basalts, to later analyze the physical properties of the stone aggregates. In a third phase that occurred in the laboratory, the samples were prepared to make the cylinders by mixing other materials such as sand, water, and cement. In the last phase, resistance was determined at 7, 14, and 28 days. As a novel contribution in this investigation, the results determined that rocks with greater hardness, fragments that have little sphericity and little roundness, and fractures that present smooth planes and microscopic crystals in the basalts, had less resistance in the case of andesite, where the crystals protrude and a discontinuous fracture is shown with fragments having little roundness and medium sphericity, they showed a difference in the resistance of the concrete that exceeded 25%. Keywords: Concrete, Hardness, Mix, Resistance, Stone Aggregates DOI： https://doi.org/10.35741/issn.0258-2724.58.4.63