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Rasvumite, Lamprophyllite, Aegirine-augite, Aegirine


Rasvumite : KFe2S3, Lamprophyllite : (Sr,K,Ba)2(Na,Ti,Mn2+,Fe3+)4Ti2[O|(O,OH,F)|Si2O7]2, Aegirine-augite : (Na,Ca)(Fe3+,Fe2+,Mg,Al)Si2O6, Aegirine : NaFe3+[Si2O6]

Photo Copyright © Pavel M. Kartashov collection & photo  - This image is copyrighted. Unauthorized reproduction prohibited.
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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