gsminmag Mineralogical Magazine Mineralogical Magazine 0026-461X Mineralogical Society 10.1180/minmag.1988.052.366.20 Mineralogical Notes A Note on Occurrence and Optical Orientation of Brewsterite Nawaz Rab Dept. of Geology, Ulster Museum, Botanic Gardens, Belfast, Northern Ireland 6 1988 52 366 416 417 28 5 1987 Copyright © 1988, The Mineralogical Society 1988 brewsterite Strontian, Scotland Giant’s Causeway, Northern Ireland optical orientation