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
Deep Navigation Colliery, Treharris, Merthyr Tydfil, Wales, UK


Locality type:Colliery
Classification
Species:Siderite
Formula:FeCO3
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Millerite2
Galena2
Siegenite2
Baryte1
Data
Mineral Data:Click here to view Siderite data
Locality Data:Click here to view Deep Navigation Colliery, Treharris, Merthyr Tydfil, Wales, UK
Data Identifiers
Mindat Occurrence Record ID:66801
Long-form Identifier:1:3:66801:7
GUID (UUID V4):0
Nearest other occurrences of Siderite
3.6km (2.2 miles) ⓘAbercynon Colliery (Dowlais Cardiff), Abercynon, Rhondda Cynon Taf, Wales, UK
3.9km (2.4 miles) ⓘPenallta Colliery, Ystrad Mynach, Caerphilly, Wales, UK
5.8km (3.6 miles) ⓘBargoed Colliery, Bargoed, Caerphilly, Wales, UK
6.4km (4.0 miles) ⓘUniversal Colliery, Senghenydd, Caerphilly, Wales, UK
7.9km (4.9 miles) ⓘWindsor Colliery, Abertridwr, Caerphilly, Wales, UK
8.2km (5.1 miles) ⓘLlanbradach Colliery, Llanbradach, Caerphilly, Wales, UK
8.8km (5.5 miles) ⓘFerndale Pits (Blaenllechau Colliery), Tylorstown, Rhondda Cynon Taf, Wales, UK
8.9km (5.5 miles) ⓘHafod Pit (Colliery), Trehafod, Rhondda Cynon Taf, Wales, UK
9.4km (5.8 miles) ⓘOakdale Colliery, Oakdale, Caerphilly, Wales, UK
9.8km (6.1 miles) ⓘBedwellty Pits, Tredegar, Blaenau Gwent, Wales, UK
References
Ian Jones collection
 
and/or  
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