Os – Osmium

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Osmiridium
Native Osmium + Iridium
Iridosmine
Rutheniridosmine

According to Mindat there are 100 known minerals containing Osmium (50 aren’t yet named):

(Ru,Os)As2

(Ir,Os,Au)

(Ni,Co)AsS with Os,Ir,Ru,Rh

OsS2

(Fe,Os,Ru,Ir)

(Fe, Ir, Ru, Os)

(Fe,Os,Ru,Ir)

(Fe,Ru,Os,Ir)

(Mo,Ru,Fe,Ir,Os)

(Ir,Os,Ru)

(Os,Ir)

(Os,Ru)As2

(Os,Ru)AsS

(Ir,Os,Ru)

(Os,Ir,Ru)

(Ir,Pt,Os)

(Os, Ir, Rh)

(Ru,Os)AsS

(IrxRuyOsz)

(Ir,Os,Ru)

(Ir,Os,Ru)

Pt(Ir,Os)2As4

(Ru,Os,Ir)1+xS2

(Os,Ni)S2

(Ru,Ir,Os,Rh,Pt)3(S,As)4

(Ir,Os,Ru,Pt,Rh)

(Ir,Au,Pt,Os,Ru,Ag)

(Ru,Pt,Ir,Os)

(Ru,Pt,Os,Ir)

(Ru,Os,Ir,Pt)

(Ru,Ir,Rh,Os,Pt)3S2

(Ir,Pt,Os,Ru)S2

(Pt,Os,Ru,Ir)2S3

(Ru,Ir,Os)5S8

(Ni,Ru,Fe,Os,Ir)

(Ru,Os,Ir,)5(Fe,Cr,Ni)6

(Os,Ir,Ru,Pt)2Fe3

(Ru,Os,Fe,Rh,Ir,Ni)3As

Pt2(Ir,Os)Fe

(Ru,Os,Ir)2Fe3

(Ru,Os,Ir)Fe3

(Os,Ir,Pt,Ru,Rh,Pd)7(As,S)12

(Ir,Pt,Pb,Os)2S3 or (Ir,Pt,Pb,Os)3S7 (?)

(Pt,Ir,Os)2(Sb,Bi)3

(Pt,Cu,Pd,Rh,Os)3S2

(Os,Ir,Ru)2S3

~(Ir,Os)2As

(Ir,Os)(As,Te)

~(Ni,Os)2As

(Os,Ru)(Cu,Fe)

From Wikipedia:

According to wikipedia –