Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Marcasite from
Dolyhir Quarry, Old Radnor, Powys, Wales, UK


Locality type:Quarry
Classification
Species:Marcasite
Formula:FeS2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Marcasite data
Locality Data:Click here to view Dolyhir Quarry, Old Radnor, Powys, Wales, UK
Data Identifiers
Mindat Occurrence Record ID:718688
Long-form Identifier:1:3:718688:2
GUID (UUID V4):0
Nearest other occurrences of Marcasite
29.0km (18.0 miles) ⓘTalachddu Mine, Talachddu, Felin-fach (Felinfach), Powys, Wales, UK
41.6km (25.9 miles) ⓘRorrington Mine, Chirbury with Brompton, Shropshire, England, UK
49.6km (30.8 miles) ⓘBig Pit (Colliery), Blaenavon, Torfaen, Wales, UK
52.3km (32.5 miles) ⓘPlynlimon Mine, Ponterwyd, Cwmrheidol, Ceredigion, Wales, UK
53.3km (33.1 miles) ⓘVaynor Quarry, Trefechan, Merthyr Tydfil, Wales, UK
54.3km (33.8 miles) ⓘFrongoch Mine, Pontrhydygroes, Upper Llanfihangell-y-Creuddyn, Ceredigion, Wales, UK
54.4km (33.8 miles) ⓘPenrhiw Mine (Penyberth Mine), Ystumtuen, Cwmrheidol, Ceredigion, Wales, UK
54.8km (34.0 miles) ⓘYstumtuen Mine, Ystumtuen, Cwmrheidol, Ceredigion, Wales, UK
54.8km (34.1 miles) ⓘCwmrheidol Mine, Ystumtuen, Cwmrheidol, Ceredigion, Wales, UK
56.2km (34.9 miles) ⓘBacheiddon Mine, Penegoes, Powys, Wales, UK
References
Cotterell, T. F.; Green, D. I.; Hubbard, N.; Mason, J. S.; Starkey, R. E.; Tindle, A. G. (2011) The Mineralogy of Dolyhir Quarry, Old Radnor, Powys, Wales. UK Journal of Mines and Minerals 32, p.5-61.
 
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