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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Ullmannite from
Grogwinion Mine, Pontrhydygroes, Upper Llanfihangell-y-Creuddyn, Ceredigion, Wales, UK


Locality type:Mine
Classification
Species:Ullmannite
Formula:NiSbS
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Ullmannite data
Locality Data:Click here to view Grogwinion Mine, Pontrhydygroes, Upper Llanfihangell-y-Creuddyn, Ceredigion, Wales, UK
Data Identifiers
Mindat Occurrence Record ID:18362
Long-form Identifier:1:3:18362:2
GUID (UUID V4):0
Nearest other occurrences of Ullmannite
0.4km (0.3 miles) ⓘGwaithgoch Mine, Pontrhydygroes, Upper Llanfihangell-y-Creuddyn, Ceredigion, Wales, UK
2.1km (1.3 miles) ⓘFrongoch Mine, Pontrhydygroes, Upper Llanfihangell-y-Creuddyn, Ceredigion, Wales, UK
2.8km (1.7 miles) ⓘHendre Felen Mine (Hendre quarry), Ysbyty Ystwyth, Ceredigion, Wales, UK
3.8km (2.4 miles) ⓘGlogfawr Mine, Lisburne Lead and Silver Mines, Ysbyty Ystwyth, Ceredigion, Wales, UK
9.9km (6.2 miles) ⓘGoginan Mine, Goginan, Melindwr, Ceredigion, Wales, UK
14.4km (9.0 miles) ⓘMynydd Gorddu Mine, Bontgoch (Elerch), Ceulanymaesmawr, Ceredigion, Wales, UK
15.4km (9.6 miles) ⓘBwlch Glas Mine, Tal-y-bont, Ceulanymaesmawr, Ceredigion, Wales, UK
19.0km (11.8 miles) ⓘEsgair Hir & Esgair Fraith mines (Cambrian Mine; Cardigan Consolidated Mine; Welsh Potosi Mine; Kylon Potosi Mine), Tal-y-bont, Ceulanymaesmawr, Ceredigion, Wales, UK
19.9km (12.4 miles) ⓘDolclettwr Mine (Treddol Mine), Tre'r-ddol, Llangynfelyn, Ceredigion, Wales, UK
References
Day, Harry (1999) BMS Database, British Micromount Society.
 
and/or  
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