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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Tetrahedrite Subgroup from
Cwmerfin Mine, Cwmerfyn, Trefeirig, Ceredigion, Wales, UK


Locality type:Mine
Classification
Species:'Tetrahedrite Subgroup' (not an IMA approved species)
Formula:Cu6(Cu4C22+)Sb4S12S
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Tetrahedrite Subgroup data
Locality Data:Click here to view Cwmerfin Mine, Cwmerfyn, Trefeirig, Ceredigion, Wales, UK
Data Identifiers
Mindat Occurrence Record ID:18520
Long-form Identifier:1:3:18520:4
GUID (UUID V4):0
Nearest other occurrences of Tetrahedrite Subgroup
0.8km (0.5 miles) ⓘCwmsymlog Mine (East Daren Mine; Gwaithddu Mine), Goginan, Trefeirig, Ceredigion, Wales, UK
1.0km (0.6 miles) ⓘBwlchrhennaid Mine (Level Newydd Mine), Pen-bont Rhydybeddau, Trefeirig, Ceredigion, Wales, UK
1.1km (0.7 miles) ⓘGoginan Mine, Goginan, Melindwr, Ceredigion, Wales, UK
1.6km (1.0 miles) ⓘCwmdaren Mine (Cwm Darren Mine; Lefel Gopor Mine; Copper Level Mine; Twll y Mwyn Mine), Pen-bont Rhydybeddau, Trefeirig, Ceredigion, Wales, UK
1.8km (1.1 miles) ⓘDaren Mine (Old Daren Mine; Darren Consolidated Mine; Daren United Mine; Great Darren Mine; Darren Mine), Pen-bont Rhydybeddau, Trefeirig, Ceredigion, Wales, UK
2.0km (1.3 miles) ⓘLletty Evanhen Mine (Vaughan Mine), Bontgoch, Trefeirig, Ceredigion, Wales, UK
37.2km (23.1 miles) ⓘMoel Ispri, Llanelltyd, Gwynedd, Wales, UK
37.2km (23.1 miles) ⓘClogau St Davids Mine (Clogau Mine; St David's Mine), Llanelltyd, Gwynedd, Wales, UK
44.1km (27.4 miles) ⓘTyddyn Gwladys Mine, Ganllwyd, Gwynedd, Wales, UK
44.4km (27.6 miles) ⓘCoed-y-Brenin deposit, Ganllwyd, Gwynedd, Wales, UK
References
Day, Harry (1999) BMS Database, British Micromount Society.
 
and/or  
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