Nikoloz Chikhradze, Nino Shekriladze, Asmat Shekiladze, Otar Kavtelashvili, Mamuka Bagnashvili. STUDY OF POSSIBILITY OF NATURAL PIGMENTS PRODUCTION ON A BASE OF UNPROFITABLE IRON DEPOSITS AND DEVELOPMENT OF TECHNOLOGIES. SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 21st SGEM International Multidisciplinary Scientific GeoConference Proceedings 2021 Nano Bio Green and Space Technologies for Sustainable Future, 2021, pp. 165-172. https://doi.org/10.5593/sgem2021/6.1/s26.39