Murat Hatipoglu. "THE EFFECT ON HUMAN HEALTH OF THE GEMMOLOGICAL USAGE OF AMETHYST (SiO2) THAT IS COLOURED WITH GAMMA IRRADIATION EXCITATION." SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 16th International Multidisciplinary Scientific GeoConference SGEM2016, Science and Technologies in Geology, Exploration and Mining, 2016. https://doi.org/10.5593/sgem2016/b11/s01.076