Development of Andesite Utilization in Gunung Ragas, Clering, Jepara, in the Industrial Sector Based on Petrological and Geochemical Data AnalysisDian Agus Widiarso, Roynaldo Lumbanbatu, Vergania Nurlita Putri and Jenian MarinE3S Web Conf., 202 (2020) 05008DOI: https://doi.org/10.1051/e3sconf/202020205008