Large partially altered crystal of rasvumite. Usually they never exceed 1 cm size. Orange rust-like product is alkali-free iron sulphide close to pyrrhotite. Associated minerals are: lustrous orange plates ingrown into rasvumite - lamprophyllite, green prismatic - later almost pure aegirine, black prismatic - former aegirin-diopside. FOV is ~ 12x10 mm. Collected by Alexandr Samsonov in 1994 on dumps of Material'naya adit. Pavel M. Kartashov collection (#2041) and photo.
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