Click on thumbnails for a larger image. Please be patient since some of these pages of thumbnail images take some time to load. These mineral photos are copyrighted by their owners and may not be used without permission.
Chromdravite: NaMg3(Cr,Fe+++)6(BO3)3Si6O18(OH)4
Comments: Dark green chromdravite grains in matrix. Location: Srednyaya Padma U-V deposit, Zaonezhie peninsula, Lake Onega, Karelia Republic, Northern Region, Russia. Scale: Specimen Size 2 cm. © Jeff Weissman / Photographic Guide to Mineral Species