Any of the minerals native platinum, osmium, iridium, palladium, rhodium, ruthenium, and their alloys, such as osmiridium (Ir,Os) , ruthenosmiridium (Ir,Os,Ru) , rutheniridosmine (Os,Ir,Ru) , and platiniridium (Ir,Pt) . Other alloys of PGM are exemplified by stanopalliadinite, (Pd,Cu)₃Sn₂ ; and potarite, PdHg . Other sources of PGM are sperrylite, PtAs₂; cooperite, (Pt,Pd,Ni)S; stibiopalladinite, Pd₅Sb₂; braggite, (Pt,Pd,Ni)S ; vysotskite, (Pd,Ni)S ; ruthenarsenite, (Ru,Ni)As ; cuproiridsite; CuIr₂S₄; cuprorhodsit, CuRh₂S₄; malanite, Cu(Pt,Ir)₂S₄; and dayingite, CuCoPtS₄. Varietal terms include plyxene and ferroplatinum for iron alloys and cuproplatinum for copper alloys.