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Samarskite-(Y)


Samarskite-(Y) : (Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8

Photo Copyright © 2006 John Sobolewski  - This image is copyrighted. Unauthorized reproduction prohibited.
Locality: Black Cloud Mine (Black Cloud pegmatite; Spillman Prospect), Teller Co., Colorado, USA
A 4.2 by 2.5 cms black, lustrous mass. Sobolewski specimen and photograph.

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