gsminmag Mineralogical Magazine Mineralogical Magazine 0026-461X Mineralogical Society 10.1180/minmag.1983.047.342.16 Short Communications Iron-rich Roscherite from Gunnislake, Cornwall Clark A. M. Fejer E. E. Couper A. G. Dept. of Mineralogy, British Museum (Natural History), Cromwell Road, London SW7 5BD von Knorring O. Turner R. W. Formerly, Dept. of Earth Sciences, University of Leeds, Leeds LS2 9JT Barstow R. W. Drakewalls, Gunnislake, Cornwall PL18 9EG 3 1983 47 342 81 83 1 8 1982 Copyright © 1983, The Mineralogical Society 1983