Calcybeborosilite-(Y)

Calcybeborosilite-(Y) : (Y,Ca)₂(□,Fe²⁺)(B,Be)₂[SiO₄]₂(OH,O)₂

Locality: Darai-Pioz (Dara-i-Pioz; Dara-Pioz) Glacier, Alai (Alayskiy) Range, Tien Shan Mts, Region of Republican Subordination, Tajikistan

Greenish-grey calcybeborosilite-(Y) grains in syenite-pegmatite from the type locality. Associating minerals are orange bafertisite, violet fluorite, white albite, reddish-brown pyrochlore crystals chains mark out sections of tabular zektzerite crystals, which is well visible under UV lamp. FOV is ~12x10 mm. Pavel M. Kartashov collection and photo.

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Calcybeborosilite-(Y)

Calcybeborosilite-(Y) : (Y,Ca)2(□,Fe2+)(B,Be)2[SiO4]2(OH,O)2

Calcybeborosilite-(Y) : (Y,Ca)₂(□,Fe²⁺)(B,Be)₂[SiO₄]₂(OH,O)₂