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
Wyllie Colliery, Wyllie, Caerphilly, Wales, UK


Locality type:Colliery
Classification
Species:Marcasite
Formula:FeS2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Marcasite data
Locality Data:Click here to view Wyllie Colliery, Wyllie, Caerphilly, Wales, UK
Data Identifiers
Mindat Occurrence Record ID:75189
Long-form Identifier:1:3:75189:4
GUID (UUID V4):0
Nearest other occurrences of Marcasite
16.7km (10.4 miles) ⓘBig Pit (Colliery), Blaenavon, Torfaen, Wales, UK
17.6km (11.0 miles) ⓘCoed-Ely Colliery, Coed Ely, Rhondda Cynon Taf, Wales, UK
21.3km (13.2 miles) ⓘVaynor Quarry, Trefechan, Merthyr Tydfil, Wales, UK
22.1km (13.8 miles) ⓘLlanilid West Opencast Coalmine, Llanharan, Rhondda Cynon Taf, Wales, UK
23.4km (14.6 miles) ⓘParc Colliery (Park), Cwmparc, Rhondda Cynon Taf, Wales, UK
27.3km (16.9 miles) ⓘLlest Colliery (Lluest Colliery), Pontyrhyl (Pont-y-rhyl), Bridgend, Wales, UK
31.0km (19.3 miles) ⓘClevedon Beach, Clevedon, North Somerset, England, UK
32.9km (20.4 miles) ⓘPark Slip West (Margam Opencast), Cefn Cribwr, Bridgend, Wales, UK
35.7km (22.2 miles) ⓘGlyn Gwilym Isaf Opencast, Clyne and Melincourt, Neath Port Talbot, Wales, UK
41.9km (26.0 miles) ⓘTalachddu Mine, Talachddu, Felin-fach (Felinfach), Powys, Wales, UK
References
Marcasite in National Museum of Wales collection
 
and/or  
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