Marcasite from selected localities.
UK | |
| BMS Database |
BMS Database | |
BMS Database | |
UKJMM No 5; BMS Database | |
| UKJMM 3 |
| Mason, J.S. (1994) A Regional Paragenesis for the Central Wales Orefield. Unpublished external M.Phil. degree thesis, University of Wales, Aberystwyth.; Rust, Steve A. (2019) Minerals of the Frongoch Mine. Published by the author, 180 pages. ISBN 978-1-9162641-0-6. |
Esgair Hir & Esgair Fraith mines, Tal-y-bont, Ceulanymaesmawr, Ceredigion, Wales, UK