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 Borocookeite

Large Borocookeite Image

Mineral: Borocookeite: Li(1+3x)Al(4-x)(BSi3)O10(OH,F)8 [x = 0-0.33]
Comments: Black and white image of multicolored tourmaline crystals (1) in fine-flaky aggregate of borocookeite (2). (AmMin, v 88, p 831).
Location: Sosedka and Mokhovaya pegmatite veins, Malkhan gem tourmaline deposit, Chikoy district, Chita oblast, Russia.
Scale: Sample size is 5 x 5 cm.
Copyright: © American Mineralogist
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