SEM image on a polished section of a Ruthenium nugget from the PGM-Au deposit at upper Miass river, Russia, showing inclusions of native Nickel (dark grey) (JEOL JSM-6460, 30kV, BSE detector, image width 400µm). Right hand side: EDS spectra on a Nickel grain (top) and the Ruthenium matrix (bottom, Bruker Xflash 6, 30kV). Quantitative EDS ...