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
Clogau St Davids Mine (Clogau Mine; St David's Mine), Llanelltyd, 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 Clogau St Davids Mine (Clogau Mine; St David's Mine), Llanelltyd, Gwynedd, Wales, UK
Data Identifiers
Mindat Occurrence Record ID:18514
Long-form Identifier:1:3:18514:3
GUID (UUID V4):0
Nearest other occurrences of Pyrrhotite
1.3km (0.8 miles) ⓘVigra Mine, Llanelltyd, Gwynedd, Wales, UK
1.7km (1.0 miles) ⓘTrial level, Vigra Mine, Llanelltyd, Gwynedd, Wales, UK
2.1km (1.3 miles) ⓘGraigwen Mine (Nant-Goch Mine), Barmouth, Gwynedd, Wales, UK
5.8km (3.6 miles) ⓘPanorama Mine (Belle View Mine), Barmouth, Gwynedd, Wales, UK
10.5km (6.5 miles) ⓘGwynfynydd Mine, Ganllwyd, Gwynedd, Wales, UK
17.1km (10.6 miles) ⓘFriar's Coat trial, Brithdir and Llanfachreth, Gwynedd, Wales, UK
19.7km (12.3 miles) ⓘPrince Edward Mine (Moel Croesau), Trawsfynydd, Gwynedd, Wales, UK
20.7km (12.8 miles) ⓘCastell Carn Dochan, Llanuwchllyn, Gwynedd, Wales, UK
26.2km (16.3 miles) ⓘCwmorthin Quarry, Tanygrisiau, Ffestiniog, Gwynedd, Wales, UK
29.7km (18.5 miles) ⓘErglodd mine (Eurglawdd Mine), Tre-Taliesin, Llangynfelyn, Ceredigion, Wales, UK
References
Taylor, W.A. (1879): Transactions of the Royal Geological Society of Cornwall 10, ci
 
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