Pyrrhotite from Osor Mines, Spain

Pyrrhotite from Osor Mines, Osor, Girona, Catalonia, Spain

Specimen pieces of Pyrrhotite from Osor Mines, Osor, Girona, Catalonia, Spain. Osor Mines is a classic Spanish locale for various minerals and ores.

Pyrrohotite is an iron sulphide mineral and is often weakly magnetic - it is sometimes informally called 'magnetic pyrite'.