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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Matildite from
Clogau St Davids Mine (Clogau Mine; St David's Mine), Llanelltyd, Gwynedd, Wales, UK


Locality type:Mine
Classification
Species:Matildite
Formula:AgBiS2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Matildite data
Locality Data:Click here to view Clogau St Davids Mine (Clogau Mine; St David's Mine), Llanelltyd, Gwynedd, Wales, UK
Data Identifiers
Mindat Occurrence Record ID:18509
Long-form Identifier:1:3:18509:1
GUID (UUID V4):0
References
R. E. Bevins (1988) Sixth Supplementary List of British Isles Minerals (Welsh). Mineralogical Magazine 52:121-124
Day, Harry (1999) BMS Database, British Micromount Society.
 
and/or  
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