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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Pyrrhotite from
Graigwen Mine (Nant-Goch Mine), Barmouth, Gwynedd, Wales, UK


Locality type:Mine
Classification
Species:Pyrrhotite
Formula:Fe1-xS
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Pyrrhotite data
Locality Data:Click here to view Graigwen Mine (Nant-Goch Mine), Barmouth, Gwynedd, Wales, UK
Data Identifiers
Mindat Occurrence Record ID:478151
Long-form Identifier:1:3:478151:6
GUID (UUID V4):0
Nearest other occurrences of Pyrrhotite
0.6km (0.4 miles) ⓘTrial level, Vigra Mine, Llanelltyd, Gwynedd, Wales, UK
0.9km (0.6 miles) ⓘVigra Mine, Llanelltyd, Gwynedd, Wales, UK
2.1km (1.3 miles) ⓘClogau St Davids Mine (Clogau Mine; St David's Mine), Llanelltyd, Gwynedd, Wales, UK
3.6km (2.2 miles) ⓘPanorama Mine (Belle View Mine), Barmouth, Gwynedd, Wales, UK
12.5km (7.8 miles) ⓘGwynfynydd Mine, Ganllwyd, Gwynedd, Wales, UK
18.9km (11.8 miles) ⓘFriar's Coat trial, Brithdir and Llanfachreth, Gwynedd, Wales, UK
21.6km (13.4 miles) ⓘPrince Edward Mine (Moel Croesau), Trawsfynydd, Gwynedd, Wales, UK
22.8km (14.2 miles) ⓘCastell Carn Dochan, Llanuwchllyn, Gwynedd, Wales, UK
27.6km (17.1 miles) ⓘCwmorthin Quarry, Tanygrisiau, Ffestiniog, Gwynedd, Wales, UK
28.4km (17.6 miles) ⓘErglodd mine (Eurglawdd Mine), Tre-Taliesin, Llangynfelyn, Ceredigion, Wales, UK
References
Goldmining in Western Merioneth, T. A. Morrison (undated)
 
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