Quartz from selected localities.
UK | |
| Henwood, W.J. (1843): Transactions of the Royal Geological Society of Cornwall 5, 1-386 |
| Henwood, W.J. (1843): Transactions of the Royal Geological Society of Cornwall 5, 1-386. |
Dines, H.G. (1956): The metalliferous mining region of south-west England. HMSO Publications (London), Vol. 1, pp. 171-172. | |
| Henwood, W.J. (1843): Transactions of the Royal Geological Society of Cornwall 5, 1-386. |
| Henwood, W.J. (1843): Transactions of the Royal Geological Society of Cornwall 5, 1-386. |
Wilson, A. C. (1975). An Occurrence of Sapphire in the Land's End Granite, Cornwall. HM Stationery Office. | |
| Henwood, W.J. (1843): Transactions of the Royal Geological Society of Cornwall 5, 1-386. |
| |
Dines, H.G. (1956): The metalliferous mining region of south-west England. HMSO Publications (London), Vol. 1, p. 125. | |
| Henwood, W.J. (1843): Transactions of the Royal Geological Society of Cornwall 5, 1-386. |