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Zincochromite, Roscoelite, Clausthalite


Zincochromite : ZnCr2O4, Roscoelite : K(V,Al)2[(OH)2|AlSi3O10], Clausthalite : PbSe

Photo Copyright © Pavel M. Kartashov collection & photo  - This image is copyrighted. Unauthorized reproduction prohibited.
Locality: Srednyaya Padma U-V deposit, Lake Onega area, Zaonezhskiy Peninsula, Karelia Republic, Northern Region, Russia
The largest which I'd saw from the locality roscoelite segregation filled with rich impregnation zincochromite microcrystals (up to 60 wol.%). Metallic-white grains of clausthalite are well visible. Specimen size is 6x4x4 cm and its radioactivity is 260 μR/h. Collected by Nadezhda Ledneva in 1990. Pavel M. Kartashov collection and photo.

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