TY - JOUR T1 - The Structural Arrangement of the Mineral Matters in Sedimentary and Crystalline Pearls. JF - Proceedings of the Royal Society of London (1854-1905) VL - 45 SP - 612 EP - 614 PY - 1888/01/01/ UR - http://dx.doi.org/10.1098/rspl.1888.0128 M3 - doi:10.1098/rspl.1888.0128 AU - Harley, G. ER -