Heidornite, a rare borate from the type locality, an oil drilling near Frenswegen, Nordhorn, Lower Saxony. Shown is a 4 mm crystalline aggregate coming up from 1968 m depth. Some of the rarest stuff you can get from Germany. (Author: Andreas Gerstenberg)
Dimensions: | 600 x 390 |
File size: | 29.54 kbytes |
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