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Nice yellow tetrahedrons of the rare beryllium silicate helvite from the type locality, Unverhofft Glück mine near Antonsthal, Erzgebirge, Saxony. Sitting with some diopsite and sphalerite on calcite. The largest tetrahedron measures a little more than 3 mm. (Author: Andreas Gerstenberg)
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| File size: | 36.49 kbytes |
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