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Emplectite needles (up to 4 mm) on chalcopyrite from Käfersteige mine, Pforzheim, Black Forest. (Author: Andreas Gerstenberg)

Emplectite needles (up to 4 mm) on chalcopyrite from Käfersteige mine, Pforzheim, Black Forest. (Author: Andreas Gerstenberg)

Dimensions: 463 x 600
File size: 24.82 kbytes
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