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Chromdravite : [Na][Mg3][(Cr3+,Fe3+)6][(OH)3|OH|(BO3)3|Si6O18] | |
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Srednyaya Padma U-V deposit, Zaonezhie peninsula, Lake Onega, Karelia Republic, Northern Region, Russia Dark green grains in matrix. S057-19 2 cm specimen, courtesy of Excalibur Mineral Company. |
| © 2007, JGW | Photo ID: 140069 View Count: 385 |
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