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Kornerupine, Quartz, Muscovite


Kornerupine : Mg3Al6(Si,Al,B)5O21(OH), Quartz : SiO2, Muscovite : KAl2[(OH)2|AlSi3O10]

Photo Copyright © California Institute of Technology  - This image is copyrighted. Unauthorized reproduction prohibited.
Locality: Bamble (Bamle), Telemark, Norway
A dark, greenish-amber 9 x 8 x 4 mm kornerupine in quartz. ID confirmed by electron microprobe analysis and described in Grew ES et al. (1990) J Petrology 31:1025-1070.

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