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GEOLOGY ON POST STAMPS |
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GEOLOGY ON POST STAMPS |
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Niger / Niger
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Lewy
górny: topaz, prawy górny: autunit, lewy dolny: leucyt, prawy
dolny: struvit; bloczek wydany w roku 1996.
Upper left:
topaz, upper right: autunite, lower left: leucite, lower right:
struvite; the stamp block issued
in 1996.
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Lewy
górny: brookit, prawy górny: elbait (indygolit), lewy dolny:
elbait (rubellit), prawy dolny: oliwin; bloczek wydany w roku 1996.
Upper left:
brookite, upper right: elbaite (indicolite), lower left: elbaite (rubellite),
lower right: olivine; the stamp block issued
in 1996.
Coll. A. Kozłowski
