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UK | |
| Golley, Peter, Williams, Richard (1995) Cornish Mineral Reference Manual. Endsleigh Book Co., Truro. 71pp. |
| Tilley, C.E. (1935) Metasomatism associated with the greenstone-hornfelses of Keninjack and Botallack, Cornwall. Mineralogical Magazine, 24, 181-202. |
| Render, Paul (n.d.) Paul Render Collection. |
- Strathpeffer and Lochalsh
| 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 Poldervaart, A. (1947) The relationship of orthopyroxene to pigeonite. Mineralogical Magazine, vol. 28, n° 198, 168, anal. 18. Henry, N.F.M. (1935) Some data on the iron-rich hypersthenes. Mineralogical Magazine, vol. 24, n° 151, 221-226. |
- Wester Ross, Strathpeffer and Lochalsh
| Render, Paul (n.d.) Paul Render Collection. |
| Render, Paul (n.d.) Paul Render Collection. |
| Render, Paul (n.d.) Paul Render Collection. |