Glassy sphalerite crystals (Ag-bearing, so-called "verglaste Blende") from HimmelsfĂŒrst mine, Brand-Erbisdorf, Saxony. 7 cm sample with Bergakademie Freiberg label. (Author: Andreas Gerstenberg)
Dimensions: | 720 x 540 |
File size: | 75.01 kbytes |
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