gsminmag Mineralogical Magazine Mineralogical Magazine 0026-461X Mineralogical Society 10.1180/minmag.1994.058.392.16 Short Communication A High-Chromium Corundum (Ruby) Inclusion in Diamond from the São Luiz Alluvial Mine, Brazil Watt G. R. Department of Geology and Geophysics, University of Edinburgh, West Mains Road, Edinburgh, EH9 3JW, UK Harris J. W. Department of Geology and Applied Geology, University of Glasgow, Glasgow, G12 8QQ, UK Harte B. Department of Geology and Geophysics, University of Edinburgh, West Mains Road, Edinburgh, EH9 3JW, UK Boyd S. R. Institute de Physique du Globe, 4, Place Jussieu, University of Paris VI, Paris, France 9 1994 58 392 490 493 19 8 1993 19 10 1993 Copyright © 1994, The Mineralogical Society 1994 inclusion corundum diamond chromium Brazil