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Comments: Sharp penetration twin of cubic loparite-(Ce) about 7 mm. across on phoenite matrix.
Location: Flora Mt., Lovosero massif, Kola Peninsula, Russia.
Scale: 3.8x3.3x2.6 cm.
© Richard Dale / Dale Minerals
Loparite-(Ce): (Ce,Na,Ca)2(Ti,Nb)2O6 Perrierite-(Ce): (Ce,La,Ca)4(Fe++,Mg)2(Ti,Fe+++)3Si4O22 Pyrochlore: (Na,Ca)2Nb2O6(OH,F) Zircon: ZrSiO4
Comments: Reddish black perrierite crystal, with orange-brown pyrochlore crystal, yellow-brown zircon, and grayish-black loparite.
Location: Buer, Bjorkedalen, Langesundfjord, Telemark, Norway.
Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species