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UK | |
| Elton, N., Green, D., Hooper, J., Weiss, S. (2004) Famous British Mineral Localities: Greystone Quarry, Lezant, Cornwall. UK Journal of Mines and Minerals 24, Rockbottom Publications. 9-28 |
| Moulding, D., Hooper, J. (2005) Minerals in the Granite Pegmatites at Chywoon Quarry, Cornwall. UK Journal of Mines and Minerals 26, 5-22 |
- Penhale and Trecarne United Mine (Caradon United Mines)
| Dines, H. G. (1956) Memoirs of the Geological Survey (1st ed.) Vol. 2 - The Metalliferous Mining Region of South-West England. Geological Survey of Great Britain, London. |
| Barstow, R. W. (1982). Variscite from Hensbarrow china clay works, St. Austell, Cornwall. Mineralogical magazine, 46, 512. |
| Rumsey, M. S., Savage, M. A. (2008) Mineralisation at North Devon United Mine, Peter Tavy, Devon. Uk Journal of Mines and Minerals 29, 49-52 |
Chywoon Quarry, Mabe, Cornwall, England, UK