Krucze Skały, Karpacz, Karkonosze County, Lower Silesian Voivodeship, Poland
1,5 cm tabular crystal of corundum in peraluminous pegmatite. Photographer and collection Eligiusz Szełeg.
© Eligiusz Szełęg
Dark violet agregate of dumortierite crystals in peraluminous pegmatite. Picture size 2 cm. Photographer and collection Eligiusz Szełeg.
Grzegorz Słowik collection and photo.
© Grzegorz Słowik
Camera: Fujifilm Finepix S9600 Collection and photograph: Zając Piotr
© Zając Piotr
Grain of zonal crystal of ferberite core (white) and Sc-Nb oxide rim (dark gray). Crystal chemical formula of Sc-Nb phase with the highest conten of Sc in composition: (Sc0.53Fe2+0.15Ti0.08Fe3+0.08Sn0.06Mn0.05Zr0.03)Σ0.92(Nb0.86W0.07Ti0.04Ta0.03)Σ1.06O4
© RR