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
Cwmsymlog Mine (East Daren Mine; Gwaithddu Mine), Goginan, 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 Cwmsymlog Mine (East Daren Mine; Gwaithddu Mine), Goginan, Trefeirig, Ceredigion, Wales, UK
Data Identifiers
Mindat Occurrence Record ID:18524
Long-form Identifier:1:3:18524:0
GUID (UUID V4):0
Nearest other occurrences of Tetrahedrite Subgroup
0.8km (0.5 miles) ⓘCwmerfin Mine, Cwmerfyn, Trefeirig, Ceredigion, Wales, UK
1.3km (0.8 miles) ⓘLletty Evanhen Mine (Vaughan Mine), Bontgoch, Trefeirig, Ceredigion, Wales, UK
1.4km (0.9 miles) ⓘBwlchrhennaid Mine (Level Newydd Mine), Pen-bont Rhydybeddau, Trefeirig, Ceredigion, Wales, UK
1.8km (1.1 miles) ⓘCwmdaren Mine (Cwm Darren Mine; Lefel Gopor Mine; Copper Level Mine; Twll y Mwyn Mine), Pen-bont Rhydybeddau, Trefeirig, Ceredigion, Wales, UK
1.9km (1.2 miles) ⓘGoginan Mine, Goginan, Melindwr, Ceredigion, Wales, UK
2.1km (1.3 miles) ⓘDaren Mine (Old Daren Mine; Darren Consolidated Mine; Daren United Mine; Great Darren Mine; Darren Mine), Pen-bont Rhydybeddau, Trefeirig, Ceredigion, Wales, UK
36.4km (22.6 miles) ⓘMoel Ispri, Llanelltyd, Gwynedd, Wales, UK
36.5km (22.7 miles) ⓘClogau St Davids Mine (Clogau Mine; St David's Mine), Llanelltyd, Gwynedd, Wales, UK
43.2km (26.9 miles) ⓘTyddyn Gwladys Mine, Ganllwyd, Gwynedd, Wales, UK
43.6km (27.1 miles) ⓘCoed-y-Brenin deposit, Ganllwyd, Gwynedd, Wales, UK
References
Day, Harry (1999) BMS Database, British Micromount Society.
 
and/or  
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