Quartz is an object of wide and versatile research. To date, much attention is paid to the elucidation of the causes of the various types of coloration of quartz. Researchers are attracted not only by the wide variability of tone and density of coloring of this mineral, but also its special nature, manifested in the discoloration (fading) of quartz when heated and in the restoration or enhancement of coloring when irradiating crystals with X-rays or radioactive rays. The coloration of quartz is associated with electronic processes caused by certain defects in the structure of the mineral.