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Bayldonite

Type Locality
Penberthy Croft Mine, St Hilary, Mount's Bay District, Cornwall, England, UK
Mineral Data
PbCu3(AsO4)2(OH)2
Strunz: 
8.BH.45
Physical Properties
Crystal System: 
Monoclinic
Hardness: 
4.5
Tenacity: 
brittle
Synonyms
Synonyms: 
Parabayldonite and Bayldonita