Tag Archives: quartz

New Pictorial Postmarks

By Wolfgang Beyer, BDPh (German Philatelic Federation) Slovakia:Mineral The postmark onmineral quartz was released on 7th October  in  Bratislava 27 , Slovakia. Taiwan:Bird The postmarks were released on 11th October 2017.All postmarks Features the Pheasant-tailed Jacana(Hydrophasianus chiurgus). Germany:Frog The postmark … Continue reading

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Croatia Issued Stamps on Minerals and Rocks

Science which examines the origins and classification of rocks is called petrology while the minerals which build rocks are the subject of investigation of mineralogy. Rocks build the solid part of the Earth – the lithosphere, which encompasses the crust … Continue reading

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Croatia will Issue Stamps on Minerals

By Wolfgang Beyer Vice Chairman of the German Philatelic Collector Group ArGe Zoologie Croatia will issue a set of two stamps on Rhyolite and Sea Salt on 24th October 2016. Rhyolite is a sour effusive rock of grey to green … Continue reading

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Slovenia Issued Stamps on Opal and Quartz Minerals

Slovenia has  issued a set of two stamps within the series “Nature Protection” depicting Slovak minerals – precious opal from Dubnik and scepter quartz from Sobov. Opal is an amorphous substance, hydrated silicon dioxide (SiO2.nH2O), with a variable amount of … Continue reading

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