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
Llanilid West Opencast Coalmine, Llanharan, Rhondda Cynon Taf, Wales, UK


Classification
Species:Siegenite
Formula:CoNi2S4
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Siegenite data
Locality Data:Click here to view Llanilid West Opencast Coalmine, Llanharan, Rhondda Cynon Taf, Wales, UK
Data Identifiers
Mindat Occurrence Record ID:87580
Long-form Identifier:1:3:87580:2
GUID (UUID V4):0
Nearest other occurrences of Siegenite
5.1km (3.2 miles) ⓘCoed-Ely Colliery, Coed Ely, Rhondda Cynon Taf, Wales, UK
12.0km (7.5 miles) ⓘWestern Colliery, Nant-y-moel, Bridgend, Wales, UK
12.8km (7.9 miles) ⓘGelli Colliery (Globe), Gelli, Rhondda Cynon Taf, Wales, UK
12.9km (8.0 miles) ⓘPark Slip West (Margam Opencast), Cefn Cribwr, Bridgend, Wales, UK
13.0km (8.1 miles) ⓘRhondda Valley, Rhondda Cynon Taf, Wales, UK
14.5km (9.0 miles) ⓘFerndale Pits (Blaenllechau Colliery), Tylorstown, Rhondda Cynon Taf, Wales, UK
14.7km (9.1 miles) ⓘParc Colliery (Park), Cwmparc, Rhondda Cynon Taf, Wales, UK
14.7km (9.1 miles) ⓘInternational Colliery, Blaengarw, Bridgend, Wales, UK
15.4km (9.6 miles) ⓘWindsor Colliery, Abertridwr, Caerphilly, Wales, UK
15.7km (9.7 miles) ⓘUniversal Colliery, Senghenydd, Caerphilly, Wales, UK
References
 
and/or  
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