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GEOLOGY ON POST STAMPS |
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GEOLOGY ON POST STAMPS |
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Gwinea Równikowa / Equatorial Guinea
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Aurichalcyt 
Aurichalcite |
Piromorfit
Pyromorphite |
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Fluoryt
Fluorite |
Halit
Halite |
Znaczki wydane w roku 1994.
The stamps issued in 1994.
Images courtesy Andrzej Zydorczak
