Sphalerite from Rhondda Cynon Taf, Wales, UK
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| Day, Harry (1999) BMS Database, British Micromount Society. |
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| Ian Jones Collection. Siegenite, dolomite and dickite confirmed by XRD at the National Museum of Wales |
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| Day, Harry (1999) BMS Database, British Micromount Society. |
| Ian Jones collection |
Coed-Ely Colliery, Coed Ely, Rhondda Cynon Taf, Wales, UK