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Rini Widya Ayu Jaswella has extensive experience in laboratory analysis and ore evaluation, currently serving as an Analyst Foreman at PT. Citra Lampia Mandiri since May 2022. Prior to this role, Rini worked as a Senior Analyst at PT Tiran Indonesia, conducting analysis on limonite and saprolite ore with various calibration methods. Rini has also held positions as a Laboratory Analyst at companies such as PT. VARIANT MANDIRI PRATAMA, PT Prima Utama Lestari, and PT. Asiamax Mining Indonesia, where responsibilities included calibration and analysis using advanced EDXRF instruments. Rini's career began as a Working Student at PT. Vale Indonesia, focusing on nickel analysis in electroplating method residue. Rini holds a Bachelor's degree in Chemistry from Universitas Negeri Makasar, completed in 2016.