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| Dunham: Geology of the North Pennine Orefield Vol.I Tyne to Stainmore (2nd Edition) |
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| Dunham, Sir K. C. Geology of the North Pennine Orefield, Volume 1 Tyne to Stainmore (2nd Edition), pp 254. |
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| Dunham, Sir K. C. Geology of the North Pennine Orefield, Volume 1 Tyne to Stainmore (2nd Edition), pp 90, 231-234. |
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| Dunham, Sir K. C. Geology of the North Pennine Orefield, Volume 1 Tyne to Stainmore (2nd Edition), pp 90, 233, 238-239. |
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| Dunham Sir K C. 1990. Geology of the Northern Pennine Orefield. Vol 1. Tyne to Stainmore. HMSO |
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| Render, Paul (n.d.) Paul Render Collection. |
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| Norman Wilson |
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| Dunham, Sir K. C. Geology of the North Pennine Orefield, Volume 1 Tyne to Stainmore (2nd Edition), pp 226-227. |
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| [var. Chalcedony] Ref: Dunham, K. C., 1990, Geology of the Northern Pennine Orefield Vol I - Tyne to Stainmore 2nd Ed. British Geological Survey, London, pp 221, 224 - 226. |
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| Brian Young (2011) MILLERITE FROM COLDBERRY GUTTER AND GREAT EGGLESHOPE, TEESDALE, COUNTY DURHAM. NHSN-Transactions-Vol-71-part-2 pp111-114 |
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| Dunham, Sir K. C. Geology of the North Pennine Orefield, Volume 1 Tyne to Stainmore (2nd Edition), pp 233, 250. |
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| Dr Stephen Moreton observation |
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| Dunham, Sir K. C. Geology of the North Pennine Orefield, Volume 1 Tyne to Stainmore (2nd Edition), pp 233, 249-250. |
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| Dunham Sir K C. 1990. Geology of the Northern Pennine Orefield. Vol 1. Tyne to Stainmore. HMSO |
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| Dunham Sir KC. 1990. Geology of the Northern Pennine Orefield. Vol 1. Tyne to Stainmore. HMSO |
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| Brian Young (2011) MILLERITE FROM COLDBERRY GUTTER AND GREAT EGGLESHOPE, TEESDALE, COUNTY DURHAM. NHSN-Transactions-Vol-71-part-2 pp111-114 |
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| Maryn Coles Collection |
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| Dunham pp218, 233, 253-4 |
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| P. Nicholson Collection |
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| Young, B. , Hyslop, E.K., Fairbairn, R.A. (1996) Coronadite from the Northern Pennine Orefield, England. Journal of the Russell Society, 6 (2) 97-98 |
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| Dewey, H., and Smith, B. (1922) Special Rep. Mineral Resources G.B. 23. |
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| P. Nicholson Collection |
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| Dunham: Geology of the North Pennine Orefield Vol.I Tyne to Stainmore (2nd Edition) |
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| Dunham KC Geology of the North Pennine Orefield Vol 1 Tyne to Stainmore. HMSO 1990 |
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| Paul Nicholson Collection |
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| Fluorite: The Collector's Choice. Extra Lapis English No. 9 |
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| Dunham, Sir K. C. Geology of the North Pennine Orefield, Volume 1 Tyne to Stainmore (2nd Edition), pp 174, 178-179. |
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| Dunham, Sir K. C. Geology of the North Pennine Orefield, Volume 1 Tyne to Stainmore (2nd Edition), pp 173-178. |
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| Paul Nicholson Collection |
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| www.ukminingventures.com (n.d.) https://www.ukminingventures.com/dianamaria.html |
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| www.ukminingventures.com (n.d.) https://www.ukminingventures.com/dianamaria.html |
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| www.ukminingventures.com (n.d.) https://www.ukminingventures.com/dianamaria.html |
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| www.ukminingventures.com (n.d.) https://www.ukminingventures.com/dianamaria.html |
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| www.ukminingventures.com (n.d.) https://www.ukminingventures.com/dianamaria.html |
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| www.ukminingventures.com (n.d.) https://www.ukminingventures.com/dianamaria.html |
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| UK Mining Ventures Ltd |
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| Dunham, K. C., 1990, Geology of the Northern Pennine orefield, v. I, 2nd Ed. British Geological Survey, London, 299 p. |
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| Fluorite: The Collector's Choice. Extra Lapis English No. 9 |
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| In the collection of (and on display in) the Lapworth Museum of Geology, University of Birmingham, West Midlands, U.K. |
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| Mineralogical Magazine 1996 60 : 317-324 |
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| A. Ions |
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| P Haas collection
A . Ions |
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| Dewey, H., and Smith, B. (1922) Special Rep. Mineral Resources G.B. 23.
Dunham K C. The geology of the Northern Pennine Orefield. Vol 1 Tyne to Stainmore. |
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| Dunham KC, Geology of the Northern Pennine Orefield, vol 1, Tyne to Stainmore. |
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| Dunham KC, Geology of the Northern Pennine Orefield Vol 1. Tyne to Stainmore |
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| Dewey, H., and Smith, B. (1922) Special Rep. Mineral Resources G.B. 23.
Fluorite: The Collector's Choice. Extra Lapis English No. 9 |
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| small crystals associated with fluorite (P Haas collection) |
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| Render, Paul (n.d.) Paul Render Collection. |
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| Render, Paul (n.d.) Paul Render Collection. |
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| Render, Paul (n.d.) Paul Render Collection. |
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| Render, Paul (n.d.) Paul Render Collection. |
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| Dunham, K. C., (1990), Geology of the North Pennine Orefield, Vol. 1, British Geological Survey |
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| Day, Harry (1999) BMS Database, British Micromount Society. |
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| [var. Citrine] [J.Ralph Collection] |
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| Dunham, Sir KC. (1990) Geology of the Northern Pennine Orefield Vol 1 Tyne to Stainmore. |
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| Martyn Coles collection |
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| Dunham, Sir K C. 1990. Geology of the Northern Pennine Orefield. Vol 1. Tyne to Stainmore. HMSO |
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| Dewey, H., and Smith, B. (1922) Special Rep. Mineral Resources G.B. 23. |
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| Dunham, Sir KC. 1990. Geology of the Northern Pennine Orefield. Vol 1. Tyne to Stainmore. HMSO |
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| Dunham, Sir K. C. Geology of the North Pennine Orefield, Volume 1 Tyne to Stainmore (2nd Edition), pp 118, 132. |
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| R. A. Ixer, C. J. Stanley and D. J. Vaughan (1979) Cobalt-, Nickel-, and Iron-Bearing Sulpharsenides from the North of England. Mineralogical Magazine 43:389-395. |
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| R. A. Ixer, C. J. Stanley and D. J. Vaughan (1979) Cobalt-, Nickel-, and Iron-Bearing Sulpharsenides from the North of England. Mineralogical Magazine 43:389-395.
P Haas collection |
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| [var. Rock Crystal] Hall, Townshend M. (1868) The Mineralogist's Directory: or, a guide to the Principal Mineral Localities in the United Kingdom of Great Britain and Ireland. Edward Stanford, London. |
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| R. A. Ixer, C. J. Stanley and D. J. Vaughan (1979) Cobalt-, Nickel-, and Iron-Bearing Sulpharsenides from the North of England. Mineralogical Magazine 43:389-395. |
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| Dunham, Sir K C> Geology of the Northern Pennine Orefield. Vol 1, Tyne to Stainmore. 1990 (HMSO) |
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| Dunham, Sir K. C. Geology of the North Pennine Orefield, Volume 1 Tyne to Stainmore (2nd Edition), pp 136-138, 143-144 |
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| Collected by many collectors |
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| Day, Harry (1999) BMS Database, British Micromount Society. |
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| Dunham, Sir K. C. Geology of the North Pennine Orefield, Volume 1 Tyne to Stainmore (2nd Edition), pp 106, 108. |
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| Fisher, J. (2009) The Hilton Mine: Scordale, Cumbria England. Rocks and Minerals, 84:2, 114-121.
Day, Harry (1999) BMS Database, British Micromount Society. |
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| Dunham, Sir K. C. Geology of the North Pennine Orefield, Volume 1 Tyne to Stainmore (2nd Edition), pp 107, 113-115. |
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| Day, Harry (1999) BMS Database, British Micromount Society. |
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| Hall, Townshend M. (1868) The Mineralogist's Directory: or, a guide to the Principal Mineral Localities in the United Kingdom of Great Britain and Ireland. Edward Stanford, London. |
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| Dunham, Sir K. C. Geology of the North Pennine Orefield, Volume 1 Tyne to Stainmore (2nd Edition), pp 167-171 |
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| Fluorite: The Collector's Choice. Extra Lapis English No. 9 |
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| Dunham, Sir K. C. Geology of the North Pennine Orefield, Volume 1 Tyne to Stainmore (2nd Edition), pp 222-223 |
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| [var. Chalcedony] Dunham, Sir K. C. Geology of the North Pennine Orefield, Volume 1 Tyne to Stainmore (2nd Edition), pp 223. |
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| [var. Chalcedony] 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 |
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| Dunham, Sir K. C. Geology of the North Pennine Orefield, Volume 1 Tyne to Stainmore (2nd Edition), pp 158-159 |
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| Dunhan Sir KC, 1990 Geology of the Northern Pennine Orefield Vol 1 Tyne to Stainmore. |
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Swinhopehead Mine, Daddry Shield, Stanhope, County Durham, England, UK