44 



BULLETIN 131, UNITED STATES NATIONAL MUSEUM 



Azurite, copper carbonate. 



Aurichalcite, copper-zinc carbonate. 



Chrysocolla, copper silicate. 



Copper pitch, copper silicate. 



Caledonite, copper-lead sulphate. 



Linarite, copper-lead sulphate. 



Chalcanthite, copper sulphate. 



Brochantite, copper sulphate. 



colum: 

 Columbite, iron columbate. 



Samarskite, rare earth columbate. 



Polycrase, rare earth columbate. 



Euxenite, rare earth columbate. 



GOL 



Native gold. 



Sylvanite, gold-silver telluride. 



Calaverite, gold telluride. 



iro: 

 Metallic iron (meteorite). 



Pyrrhotite, iron sulphide. 



Bornite, copper-iron sulphide. 



Chalcopyrite, copper-iron sulphide. 



Marcasite, iron sulphide. 



Pyrite, iron sulphide. 



Arsenopyrite, arsenic-iron sulphide. 



Hematite, iron oxide. 



Ilmenite, iron-titanium oxide. 



Magnetite, iron oxide. 



Chromite, iron-chromium oxide. 



Turgite, hydrous iron oxide. 



Goethite, hydrous iron oxide. 



Limonite, hydrous iron oxide. 



Ankerite, magnesium-iron carbonate. 



Siderite, iron carbonate. 



LEAI 



Native lead. 



Galena, lead sulphide. 



Jamesonite. lead-antimony sulphide. 



Boulangerite, lead-antimony sulphide. 



Owyheeite, lead-silver-antimony sulphide. 



Massicot, lead oxide. 



Minium, lead oxide. 



Cerusite, lead carbonate. 



Plattnerite, lead dioxide. 



Pyromorphite, lead phosphate. 



Mimetite, lead arsenate. 



Vanadinite, lead vanadate. 



Bindheimite, lead antimonate. 



Wulfenite, lead molybdate. 



Anglesite, lead sulphate. 



Leadhillite, lead sulphate-carbonate. 



Caledonite, lead-copper sulphate. 



Linarite, lead-copper sulphate. 



