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Terrywallaceite

About

Terrywallaceite is an extremely rare silver-based mineral discovered in 2005 about 180 miles southeast of Lima, Peru, by William Pinch and characterized by a University of Arizona mineralogy team led by Robert Downs

Type Locality
Level 390, Vein 14, Herminia Mine, Julcani District, Angaraes Province, Huancavelica Department, Peru
Mineral Data
AgPb(Sb,Bi)3S6
Isostructural with: 
Gustavite
Physical Properties
Colour: 
Black metallic
Crystal System: 
Monoclinic
Hardness: 
4 -
Photos