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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Siegenite from
Oakdale Colliery, Oakdale, Caerphilly, Wales, UK


Locality type:Colliery
Classification
Species:Siegenite
Formula:CoNi2S4
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Siegenite data
Locality Data:Click here to view Oakdale Colliery, Oakdale, Caerphilly, Wales, UK
Data Identifiers
Mindat Occurrence Record ID:68343
Long-form Identifier:1:3:68343:2
GUID (UUID V4):0
Nearest other occurrences of Siegenite
9.3km (5.8 miles) ⓘLlanbradach Colliery, Llanbradach, Caerphilly, Wales, UK
9.4km (5.8 miles) ⓘDeep Navigation Colliery, Treharris, Merthyr Tydfil, Wales, UK
11.2km (7.0 miles) ⓘUniversal Colliery, Senghenydd, Caerphilly, Wales, UK
11.9km (7.4 miles) ⓘWindsor Colliery, Abertridwr, Caerphilly, Wales, UK
18.2km (11.3 miles) ⓘFerndale Pits (Blaenllechau Colliery), Tylorstown, Rhondda Cynon Taf, Wales, UK
21.4km (13.3 miles) ⓘGelli Colliery (Globe), Gelli, Rhondda Cynon Taf, Wales, UK
21.7km (13.5 miles) ⓘRhondda Valley, Rhondda Cynon Taf, Wales, UK
22.0km (13.7 miles) ⓘCoed-Ely Colliery, Coed Ely, Rhondda Cynon Taf, Wales, UK
25.2km (15.7 miles) ⓘParc Colliery (Park), Cwmparc, Rhondda Cynon Taf, Wales, UK
26.3km (16.3 miles) ⓘWestern Colliery, Nant-y-moel, Bridgend, Wales, UK
References
Ian Jones collection
 
and/or  
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