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Dark bluish green allophane on dolomite from Viktor mine, Eisenberg near Korbach, Sauerland, Hesse (8,5 cm). (Author: Andreas Gerstenberg)

Dark bluish green allophane on dolomite from Viktor mine, Eisenberg near Korbach, Sauerland, Hesse (8,5 cm). (Author: Andreas Gerstenberg)

Dimensions: 600 x 451
File size: 53.74 kbytes
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