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Chromdravite


Chromdravite : [Na][Mg3][(Cr3+,Fe3+)6][(OH)3|OH|(BO3)3|Si6O18]

Photo Copyright © 2007, Jeffrey G, Weissman  - This image is copyrighted. Unauthorized reproduction prohibited.
Locality: Onega trough, Karelia Republic, Northern Region, Russia
Dark green grains in matrix, 2 cm specimen, courtesy of Excalibur Mineral.

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