11 November (Personalized and Private Mail Stamps ) within release Czech Republic : My Own Stamps goes into circulation Stamp Pseudoleucit face value B No Face Value
Stamp Pseudoleucit in catalogues | |
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POFIS: | POF: CZ VZ1502 |
Stamp is square format.
Also in the issue Czech Republic : My Own Stamps:
Stamp Pseudoleucit it reflects the thematic directions:
Mineralogy is a subject of geology specializing in the scientific study of the chemistry, crystal structure, and physical (including optical) properties of minerals and mineralized artifacts. Specific studies within mineralogy include the processes of mineral origin and formation, classification of minerals, their geographical distribution, as well as their utilization.
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