Sphalerite from Trefeirig, Ceredigion, Wales, UK
UK | |
| Chris Popham Collection |
Chris Popham Collection | |
Chris Popham Collection | |
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Jones, A. D. (1987) The minerals of Llechwedd Helyg. UK Journal of Mines and Minerals 3, 25-27 | |
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P Haas, inspection of the dump in 2005 | |