Oct 25, 2013

Slovakia FDC on "Slovak Minerals – Sceptre Quartz from Šobov"

First Day Cover
Sobrescrito de 1.º Dia


Slovak Minerals – Sceptre Quartz from Šobov

Date of Issue : 11 October 2013

Quartz (SiO2) is one of the most common minerals in nature forming hexagonal columnar crystals finished with planes of trapezohedron or dipyramid.

A druse of crystals of ore minerals (sphalerite, chalcopyrite, galena) with quartz and calcite from Banská Štiavnica is depicted on FDC. And a crystalline structure of euchroite – secondary arsenate of copper from Ľubietová, which is one of 19 Slovak minerals first found and noted down in Slovakia, represents a motif of the FDC cancellation.

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