The following report shows the experimental results of detecting Ru (ruthenium) element, in metamorphic rocks, found on different geographic areas of Colombian, performing X-ray fluorescence spectroscopy (XRF). After field work, developed by the group and in order to classify the different rock samples, obtained at the outputs from differentColombian areas (white beach in Santa Marta, Cartagena, Sierra Nevada de Santa Marta, Chicamocha´s Canyon Santander and near Villa de Leyva Boyaca), in a particular group of samples (Chicamocha´s Canyon Santander), was detected Ru, by XRF a rare element in nature, but even more uncommon in this area.