The study area focuses on the Huaylilllas formation located around the city of Tacna, where no zones with potential ornamental use have been identified. A geological-geomorphological and geomechanical mapping was carried out with the aim of providing a technological and geomechanical characterization. Twenty-two geomechanical stations were conducted to obtain a characterization, revealing that the Lower Huaylillas member is poor rock and the upper member is fair to good rock. As it approaches the Millo Formation or the contact with the Lower Huaylillas, the rock's RMR quality decreases. The physical and mechanical properties of 20 samples were determined, yielding the following values: porosity (1.6-32.4%), dry density (1.5-2.3 g/cm3), absorption (0.7-20.4%), specific weight (2.0-2.5 g/cm3), and uniaxial compressive strength (7.98-91.45 MPa). Consolidated tuff with vitroclastolithic lith...