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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Siderite from
Eaglebrook Mine, Tal-y-bont, Ceulanymaesmawr, Ceredigion, Wales, UK


Locality type:Mine
Classification
Species:Siderite
Formula:FeCO3
Confirmation
Validity:Unconfirmed/Questioned
Data
Mineral Data:Click here to view Siderite data
Locality Data:Click here to view Eaglebrook Mine, Tal-y-bont, Ceulanymaesmawr, Ceredigion, Wales, UK
Data Identifiers
Mindat Occurrence Record ID:17632
Long-form Identifier:1:3:17632:1
GUID (UUID V4):0
Nearest other occurrences of Siderite
5.5km (3.4 miles) ⓘYstrad Einion Mine (Dolgoch Mine), Furnace, Ysgubor-y-coed, Ceredigion, Wales, UK
7.4km (4.6 miles) ⓘCwmbyr Mine, Penegoes, Powys, Wales, UK
10.4km (6.5 miles) ⓘCythfartha Mine, Penegoes, Powys, Wales, UK
11.5km (7.1 miles) ⓘAfon Clyywedog Gorge, Penegoes, Powys, Wales, UK
11.9km (7.4 miles) ⓘCastle Rock Mine, Penegoes, Powys, Wales, UK
14.9km (9.2 miles) ⓘCeulan Mine, Pennant, Powys, Wales, UK
15.6km (9.7 miles) ⓘLlannerch-yr aur Mine, Pennant, Powys, Wales, UK
16.0km (9.9 miles) ⓘCwmystwyth Mine, Cwmystwyth, Upper Llanfihangell-y-Creuddyn, Ceredigion, Wales, UK
31.5km (19.6 miles) ⓘClogau St Davids Mine (Clogau Mine; St David's Mine), Llanelltyd, Gwynedd, Wales, UK
32.0km (19.9 miles) ⓘNant-y-Car Mine, Rhayader, Powys, Wales, UK
References
Day, Harry (1999) BMS Database, British Micromount Society.
 
and/or  
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