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
Big Pit (Colliery), Blaenavon, Torfaen, 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 Big Pit (Colliery), Blaenavon, Torfaen, Wales, UK
Data Identifiers
Mindat Occurrence Record ID:82053
Long-form Identifier:1:3:82053:8
GUID (UUID V4):0
Nearest other occurrences of Marcasite
16.7km (10.4 miles) ⓘWyllie Colliery, Wyllie, Caerphilly, Wales, UK
20.1km (12.5 miles) ⓘVaynor Quarry, Trefechan, Merthyr Tydfil, Wales, UK
29.5km (18.3 miles) ⓘTalachddu Mine, Talachddu, Felin-fach (Felinfach), Powys, Wales, UK
31.8km (19.8 miles) ⓘCoed-Ely Colliery, Coed Ely, Rhondda Cynon Taf, Wales, UK
32.2km (20.0 miles) ⓘParc Colliery (Park), Cwmparc, Rhondda Cynon Taf, Wales, UK
36.9km (22.9 miles) ⓘLlanilid West Opencast Coalmine, Llanharan, Rhondda Cynon Taf, Wales, UK
38.3km (23.8 miles) ⓘLlest Colliery (Lluest Colliery), Pontyrhyl (Pont-y-rhyl), Bridgend, Wales, UK
40.4km (25.1 miles) ⓘClevedon Beach, Clevedon, North Somerset, England, UK
41.6km (25.8 miles) ⓘGlyn Gwilym Isaf Opencast, Clyne and Melincourt, Neath Port Talbot, Wales, UK
45.1km (28.0 miles) ⓘPark Slip West (Margam Opencast), Cefn Cribwr, Bridgend, Wales, UK
References
Ian Jones or national Museum of Wales collections
 
and/or  
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