Abstract
The article presents the results of a study of the chemical composition of new volumetric-surface concentric-zonal color spectra in ash-ceramic materials associated with a well-known phenomenon in the scientific world called "Kulbek's Rings". One of the variants of the "Kulbek's Ring" was used as an object of research, which takes place in samples made on the basis of ash generated from the combustion of Ekibastuz coal. The experimental studies were carried out by the method of X-ray fluorescence (XRF) analysis on a special laboratory setup. Concentric-zonal color spectra in the phenomenon of "Kulbek's Ring" in ash-ceramic cylindrical samples are located strictly symmetrically relative to the center of the surface. The research focused on this provision. An analysis of the XRF spectra showed that symmetry, i.e., uniformity, is observed concentrically located in the color bands of the sample