File:Chalcedon 2.jpg
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| Description |
English: Mineral chalcedony, chemical composition:SiO2, from collection of National Museum, Prague, originally from Czech Republic
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| Date | |
| Source | Own work |
| Author | Karelj |
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I, the copyright holder of this work, release this work into the public domain. This applies worldwide. In some countries this may not be legally possible; if so: I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
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| current | 22:22, 23 April 2008 | | 1,876 × 1,304 (1.43 MB) | Karelj (talk | contribs) | {{en|Mineral chalcedone from collection of National Museum, Prague, originally from Czech Republic}} {{cs|Minerál chalcedon ze sbírek Národního muzea původem z [[:cs:Nová Paka|Nové Pak |
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