gsminmag Mineralogical Magazine Mineralogical Magazine 0026-461X Mineralogical Society 10.1180/minmag.1953.030.220.03 Observations on the Colouring of Pink and Green Zoned Tourmaline Bradley J. E. S. B.Sc., Ph.D. Bradley Olive B.Sc., Ph.D. Geology and Physics Departments, King’s College, University of London. 3 1953 30 220 26 38 Copyright © 1953, The Mineralogical Society 1953