13 August (Personalized and Private Mail Stamps ) within release Czech Republic : My Own Stamps goes into circulation Stamp Fluorit, krystal face value B No Face Value
Stamp Fluorit, krystal in catalogues | |
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POFIS: | POF: CZ VZ0975 |
Stamp is square format.
Also in the issue Czech Republic : My Own Stamps:
Stamp Fluorit, krystal 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