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Comments: A black crystal of samarskite. Ex collection Gustav Rose 1832, found on his travel together with Alexander von Humboldt through the Ural Mts.
Location: Miass, Ilmen Mts, Chelyabinsk Oblast', Urals Region, Russia.
Scale: Crystal size 8 mm.
© Thomas Witzke / Abraxas-Verlag
Samarskite-(Y): (Y,Fe+++,U)(Nb,Ta)5O4 Uranpyrochlore: (U,Ca,Ce)2(Nb,Ta)2O6(OH,F)
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
Comments: A small but intricate cluster of fairly sharp samarskite-(Y) crystals (overall dimensions 15 by 15 by 22 mm) dug from the floor of the open cut.
Location: Spinelli Quarry (Spinelli prospect), South Glastonbury, Glastonbury, Hartford Co., Connecticut, USA.
Scale: See Image.
© Fred Davis