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UK | |
| Fluorite: The Collector's Choice. Extra Lapis English No. 9 |
| Norman Wilson collection |
| Dunham, K. C., 1990, Geology of the North Pennines Orefield, v.1, 2nd ed. |
| Fluorite: The Collector's Choice. Extra Lapis English No. 9 |
| Dunham, Sir K. C. Geology of the North Pennine Orefield, Volume 1 Tyne to Stainmore (2nd Edition), pp 222-223 |
| Dunham, Sir K. C. Geology of the North Pennine Orefield, Volume 1 Tyne to Stainmore (2nd Edition), pp 223. |
| Dunham, Sir K. C. Geology of the North Pennine Orefield, Volume 1 Tyne to Stainmore (2nd Edition), pp 223. |
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| Dunham, Sir K. C. Geology of the North Pennine Orefield, Volume 1 Tyne to Stainmore (2nd Edition), pp 156-157 |
| Dunham, Sir K. C. Geology of the North Pennine Orefield, Volume 1 Tyne to Stainmore (2nd Edition), pp 158-159 |
| Dunhan Sir KC, 1990 Geology of the Northern Pennine Orefield Vol 1 Tyne to Stainmore. |
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St Peter's Mine, Sparty Lea, Allendale, Northumberland, England, UK