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Uranpyrochlore: (U,Ca,Ce)2(Nb,Ta)2O6(OH,F) Samarskite-(Y): (Y,Fe+++,U)(Nb,Ta)5O4
Comments: Deep greenish-brown resinous crystalline massive uranpyrochlore with black samarskite-(Y).
Location: Beryl Hill, near Yinnietharra Station, Western Australia, Australia.
Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species