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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Mattheddleite from
Esgair Mwyn Mine, Ysbyty Ystwyth, Ceredigion, Wales, UK


Locality type:Mine
Classification
Species:Mattheddleite
Formula:Pb5(SiO4)1.5(SO4)1.5(Cl,OH)
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Mattheddleite data
Locality Data:Click here to view Esgair Mwyn Mine, Ysbyty Ystwyth, Ceredigion, Wales, UK
Data Identifiers
Mindat Occurrence Record ID:39015
Long-form Identifier:1:3:39015:2
GUID (UUID V4):0
Nearest other occurrences of Mattheddleite
3.4km (2.1 miles) ⓘHendre Felen Mine (Hendre quarry), Ysbyty Ystwyth, Ceredigion, Wales, UK
6.1km (3.8 miles) ⓘFrongoch Mine, Pontrhydygroes, Upper Llanfihangell-y-Creuddyn, Ceredigion, Wales, UK
15.8km (9.8 miles) ⓘDaren Mine (Old Daren Mine; Darren Consolidated Mine; Daren United Mine; Great Darren Mine; Darren Mine), Pen-bont Rhydybeddau, Trefeirig, Ceredigion, Wales, UK
17.2km (10.7 miles) ⓘLlechwedd Helyg Mine (Willow Bank Mine), Pen-bont Rhydybeddau, Trefeirig, Ceredigion, Wales, UK
19.1km (11.9 miles) ⓘBwlch Glas Mine, Tal-y-bont, Ceulanymaesmawr, Ceredigion, Wales, UK
20.1km (12.5 miles) ⓘEaglebrook Mine, Tal-y-bont, Ceulanymaesmawr, Ceredigion, Wales, UK
22.2km (13.8 miles) ⓘEsgair Hir & Esgair Fraith mines (Cambrian Mine; Cardigan Consolidated Mine; Welsh Potosi Mine; Kylon Potosi Mine), Tal-y-bont, Ceulanymaesmawr, Ceredigion, Wales, UK
92.7km (57.6 miles) ⓘMachen quarry, Machen, Caerphilly, Wales, UK
References
S Rust collection
 
and/or  
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