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GEOLOGY ON POST STAMPS |
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GEOLOGY ON POST STAMPS |
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Niemiecka Republika Demokratyczna / German Democratic Republic
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Erytryn ze Schneebergu Erythrine
from Schneeberg |
Fluoryt z Halsbrücke Fluorite from
Halsbrücke |
Galena z Neudorf (Harz) Galena from
Neudorf (Harz) |
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Kwarc dymny z Lichtenbergu Smoky quartz
from Lichtenberg |
Kalcyt z Niederrabenstein Kalcyt from
Niederrabenstein |
Srebro rodzime z Freibergu Native silver
from Freiberg |
Coll. Tomasz Praszkier
