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Mineralogi & ädelstenar
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Rohstoffland Ruhrgebiet – Geologie erleben Ungewöhnliche Landschaftsformen, Geotope, Gesteinsaufschlüsse, Quellen und Seen, Schauhöhlen und Besucherbergwerke, Wanderwege und Museen …
A material that enchants us as ruby or sapphire and is applied in watches or lasers.A material that gives us a better life in the form of implants.A material that provides …
In this book you will find a lot of exciting and often astonishing information about these extraordinary and diverse materials. The presentation is essentially structured …