Exploring grain sizing of sedimentary calcareous rocks using Raman spectroscopy C. Indelicato, I. Osticioli, J. Agresti, D. Ciofini, A. A. Mencaglia, M. Perotti, C. Viti, R. Moreschi and S. Siano Eur. Phys. J. Plus, 137 3 (2022) 359 Published online: 18 March 2022 DOI: 10.1140/epjp/s13360-022-02536-7