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


01534120017272036467226.jpg
Millerite

Eaglebrook Mine, Tal-y-bont, Ceulanymaesmawr, Ceredigion, Wales, UK
00015990017272018169228.jpg
Millerite, etc.

Eaglebrook Mine, Tal-y-bont, Ceulanymaesmawr, Ceredigion, Wales, UK
04933060017272018184047.jpg
Millerite, etc.

Eaglebrook Mine, Tal-y-bont, Ceulanymaesmawr, Ceredigion, Wales, UK
01534120017272036467226.jpg
Millerite

Eaglebrook Mine, Tal-y-bont, Ceulanymaesmawr, Ceredigion, Wales, UK
08457060017369352794690.jpg
Millerite, etc.

Eaglebrook Mine, Tal-y-bont, Ceulanymaesmawr, Ceredigion, Wales, UK
04829450017362215099954.jpg
Millerite, etc.

Eaglebrook Mine, Tal-y-bont, Ceulanymaesmawr, Ceredigion, Wales, UK
01534120017272036467226.jpg
Millerite

Eaglebrook Mine, Tal-y-bont, Ceulanymaesmawr, Ceredigion, Wales, UK
00015990017272018169228.jpg
Millerite, etc.

Eaglebrook Mine, Tal-y-bont, Ceulanymaesmawr, Ceredigion, Wales, UK
04829450017362215099954.jpg
Millerite, etc.

Eaglebrook Mine, Tal-y-bont, Ceulanymaesmawr, Ceredigion, Wales, UK
Locality type:Mine
Classification
Species:Millerite
Formula:NiS
Comments:Millerite is found as wire-like contorted crystals to 1cm+ in veinstone.
Habit:Prismatic
Quality for species:Poor for species, only of interest for locality collectors. (#)
Abundance at site:Rare
Confirmation
Validity:Confirmed
Confirmation Methods:Visually Identified
Associated Minerals Based on Photo Data:
Malachite2
Quartz2
Galena1
Anglesite1
Native Sulphur1
Pyrite1
Data
Mineral Data:Click here to view Millerite data
Locality Data:Click here to view Eaglebrook Mine, Tal-y-bont, Ceulanymaesmawr, Ceredigion, Wales, UK
Photo GalleryView Gallery (3 photos)
Data Identifiers
Mindat Occurrence Record ID:16931
Long-form Identifier:1:3:16931:2
GUID (UUID V4):0
Nearest other occurrences of Millerite
0.9km (0.6 miles) ⓘHenfwlch Mine, Tal-y-bont, Ceulanymaesmawr, Ceredigion, Wales, UK
1.6km (1.0 miles) ⓘBryn-yr-Afr Mine, Ponterwyd, Trefeirig, Ceredigion, Wales, UK
2.1km (1.3 miles) ⓘEsgair Hir & Esgair Fraith mines (Cambrian Mine; Cardigan Consolidated Mine; Welsh Potosi Mine; Kylon Potosi Mine), Tal-y-bont, Ceulanymaesmawr, Ceredigion, Wales, UK
2.4km (1.5 miles) ⓘCamdwrmawr Mine, Ponterwyd, Trefeirig, Ceredigion, Wales, UK
5.1km (3.1 miles) ⓘHyddgen Mine, Carn Hyddgen, Uwch y Garreg, Powys, Wales, UK
7.5km (4.7 miles) ⓘBrynarian Mine (Cardigan Bay Consols Mine), Tre-Taliesin, Llangynfelyn, Ceredigion, Wales, UK
8.0km (5.0 miles) ⓘErglodd mine (Eurglawdd Mine), Tre-Taliesin, Llangynfelyn, Ceredigion, Wales, UK
17.1km (10.6 miles) ⓘGwaithgoch Mine, Pontrhydygroes, Upper Llanfihangell-y-Creuddyn, Ceredigion, Wales, UK
67.0km (41.7 miles) ⓘDrws-y-Coed Mine (Drwy-y-Coed Mine), Nantlle Vale, Llanllyfni, Gwynedd, Wales, UK
78.4km (48.7 miles) ⓘNant Helen opencast coal mine, Onllwyn, Neath Port Talbot, Wales, UK
References
Day, Harry (1999) BMS Database, British Micromount Society.
 
and/or  
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