0.3 mm complex grain of iron silicides from Au-PGM concentrates from Is river basin. The main medium bright slightly pinkish mineral is xifengite. It form the matrix, containing mixture of gupeiite (the most bright, white mineral) and fersilicite (the most dark, greyish mineral forming rounded elongated grains). Polished preparate in reflected light. Collected and investigated by Mikhail Generalov in begining of the 90th. Pavel M. Kartashov collection (#3328) and photo.
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