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Samarskite-(Yb): (Yb,Y,REE,U,Th,Ca,Fe++) (Nb,Ta,Ti)O4
Comments: Black samarskite-(Yb) on matrix.
Location: 1.0 Ga Pikes Peak batholith, Little Patsy pegmatite, South Platte Pegmatite district, Jefferson County, Colorado, U.S.A..
Scale: See Image.
© Sarah L. Hansen