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Keiviite-(Y), Fluorite (Var: Yttrofluorite), Microcline (Var: Amazonite)


Keiviite-(Y) : (Y,Yb)2[Si2O7], Fluorite (Var: Yttrofluorite) : (Ca,Y)F2-3, Microcline (Var: Amazonite) : K[AlSi3O8]

Photo Copyright © Pavel M. Kartashov collection & photo  - This image is copyrighted. Unauthorized reproduction prohibited.
Locality: Ploskaya Mt, Western Keivy Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia
Typical appearance of keiviite-(Y) at the locality. It grows in thin veinlets of later light-violet to colourless yttrofluorite-III (with ~5 % of Y) in amazonite blocks. Keiviite-(Y) forms tabular creamy-white crystals up to 1-2 mm in such veinlets. FOV is 1.5x1.2 cm. Collected in September 1990. Pavel M. Kartashov collection and photo.

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