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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Millerite from
Wyllie Colliery, Wyllie, Caerphilly, Wales, UK


01972080017368955433942.jpg
Millerite, etc.

Wyllie Colliery, Wyllie, Caerphilly, Wales, UK
01972080017368955433942.jpg
Millerite, etc.

Wyllie Colliery, Wyllie, Caerphilly, Wales, UK
03945170017272032161485.jpg
Millerite, etc.

Wyllie Colliery, Wyllie, Caerphilly, Wales, UK
Locality type:Colliery
Classification
Species:Millerite
Formula:NiS
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Siderite1
Quartz1
Data
Mineral Data:Click here to view Millerite data
Locality Data:Click here to view Wyllie Colliery, Wyllie, Caerphilly, Wales, UK
Data Identifiers
Mindat Occurrence Record ID:75188
Long-form Identifier:1:3:75188:5
GUID (UUID V4):0
Nearest other occurrences of Millerite
3.6km (2.2 miles) ⓘBedwas Colliery, Bedwas, Caerphilly, Wales, UK
3.7km (2.3 miles) ⓘLlanbradach Colliery, Llanbradach, Caerphilly, Wales, UK
4.9km (3.0 miles) ⓘPenallta Colliery, Ystrad Mynach, Caerphilly, Wales, UK
4.9km (3.1 miles) ⓘRisca Colliery (Blackvein Colliery), Risca, Caerphilly, Wales, UK
5.9km (3.7 miles) ⓘOakdale Colliery, Oakdale, Caerphilly, Wales, UK
6.7km (4.2 miles) ⓘUniversal Colliery, Senghenydd, Caerphilly, Wales, UK
6.8km (4.2 miles) ⓘWindsor Colliery, Abertridwr, Caerphilly, Wales, UK
7.1km (4.4 miles) ⓘBargoed Colliery, Bargoed, Caerphilly, Wales, UK
8.7km (5.4 miles) ⓘMarkham Colliery, Markham, Caerphilly, Wales, UK
8.7km (5.4 miles) ⓘDeep Navigation Colliery, Treharris, Merthyr Tydfil, Wales, UK
References
Marcasite in National Museum of Wales collection
 
and/or  
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