IRARSITE (Ir,Ru,Rh,Pt)AsS (cubic)
cobaltite group

scanning electron micrograph of irarsite (IRS) inclusions in inaglyite (INGL), in isoferroplatinum (IFP) with inclusions hollingworthite (HL), and sperrylite (SP)
platinum placer near Mount Filipp, Kamchatka District, Russian Far East, Russia