25 August (China, People's Republic ) within release Minerals goes into circulation Stamp Minerals face value 4 Chinese fen
Stamp Minerals in catalogues | |
---|---|
Michel: | Mi:CN 1818 |
Stamp is vertical format.
Also in the issue Minerals:
Stamp Minerals it reflects the thematic directions:
In geology and mineralogy, a mineral or mineral species is, broadly speaking, a solid substance with a fairly well-defined chemical composition and a specific crystal structure that occurs naturally in pure form