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UK | |
| Reid, C., Flett, J.S., Wilkinson, B.S.N., Dixon, E.E.L., Pollard, W., and MacAlister, D.A. (1907): The Geology of the Land's End District. HMSO Publications (London), pp. 46-47. |
| Wilson, A. C. (1975) An occurrence of sapphire in the Land's End Granite, Cornwall. Bulletin of the Geological Survey of Great Britain 52, Geological Survey of Great Britain. 61-64 |
| Collins, J. H. (1871) A Handbook to the Mineralogy of Cornwall and Devon. Heard and Sons, Truro. |
| Ian Jones collection |
| Russell, A. (1910): Mineralogical Magazine 15, 377-384 |
| Reid, C., Flett, J.S., Wilkinson, B.S.N., Dixon, E.E.L., Pollard, W., and MacAlister, D.A. (1907): The Geology of the Land's End District. HMSO Publications (London), p. 47 |
| Golley, Peter, Williams, Richard (1995) Cornish Mineral Reference Manual. Endsleigh Book Co., Truro. 71pp. Rowe, T.P., and Le Neve Foster, C. (1879): Transactions of the Royal Geological Society of Cornwall 10, 10-17 |
| Golley, Peter, Williams, Richard (1995) Cornish Mineral Reference Manual. Endsleigh Book Co., Truro. 71pp. |
| Collins, J. H. (1871) A Handbook to the Mineralogy of Cornwall and Devon. Heard and Sons, Truro. |