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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Arsenopyrite from
Prince Edward Mine (Moel Croesau), Trawsfynydd, Gwynedd, Wales, UK


Locality type:Mine
Classification
Species:Arsenopyrite
Formula:FeAsS
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Arsenopyrite data
Locality Data:Click here to view Prince Edward Mine (Moel Croesau), Trawsfynydd, Gwynedd, Wales, UK
Data Identifiers
Mindat Occurrence Record ID:18686
Long-form Identifier:1:3:18686:9
GUID (UUID V4):0
Nearest other occurrences of Arsenopyrite
11.7km (7.3 miles) ⓘTyddyn Gwladys Mine, Ganllwyd, Gwynedd, Wales, UK
13.2km (8.2 miles) ⓘCastell Carn Dochan, Llanuwchllyn, Gwynedd, Wales, UK
13.5km (8.4 miles) ⓘDolfrwnog Mine (incl. Turf Copper Mine), Ganllwyd, Gwynedd, Wales, UK
16.5km (10.2 miles) ⓘCaegwernog Mine, Llanelltyd, Gwynedd, Wales, UK
16.9km (10.5 miles) ⓘSygun Mine, Beddgelert, Gwynedd, Wales, UK
19.7km (12.3 miles) ⓘClogau St Davids Mine (Clogau Mine; St David's Mine), Llanelltyd, Gwynedd, Wales, UK
20.9km (13.0 miles) ⓘVigra Mine, Llanelltyd, Gwynedd, Wales, UK
20.9km (13.0 miles) ⓘTrial level, Vigra Mine, Llanelltyd, Gwynedd, Wales, UK
24.8km (15.4 miles) ⓘDrws-y-Coed Mine (Drwy-y-Coed Mine), Nantlle Vale, Llanllyfni, Gwynedd, Wales, UK
24.8km (15.4 miles) ⓘSimdde Dylluan Mine (Talysarn Mine), Nantlle Vale, Llanllyfni, Gwynedd, Wales, UK
References
Day, Harry (1999) BMS Database, British Micromount Society.
 
and/or  
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