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Irarsite: (Ir,Ru,Rh,Pt)AsS Ruthenarsenite: (Ru,Ni)As
Comments: Photomicrograph of the largest inclusion of ruthenarsenite (Ru) associated with irarsite inclusions (Ir) in a rutheniridosmine matrix. (CanMin, v12:280). Location: Papua New Guinea. Scale: See Image. © Canadian Mineralogist