Muscovite from selected localities.
UK | |
| Wilson, A. C. (1975). An Occurrence of Sapphire in the Land's End Granite, Cornwall. HM Stationery Office. |
| [var: Gilbertite] Dines, H.G. (1956): The metalliferous mining region of south-west England. HMSO Publications (London), Vol. 1, p. 125. |