- North, West and Central Sutherland
| Livingstone, A., Macpherson, H. G. (1983) Fifth supplementary list of British minerals (Scottish) Mineralogical Magazine, 47 (342) 99-105 doi:10.1180/minmag.1983.047.342.23 Gallagher, M.J. et al. (1974) Trans. Inst. Mining Metall. 83, B83. [M.A. 75-930.] Handbook of Mineralogy. |