Source: Pascal Brackman
Markasietknolletjes kunnen uitgroeien tot "drolletjes" of zelfs uit de kluiten gewassen fallussymbolen. Pas als je die open hakt zie je de prachtige radiale kristalstructuur van het ijzer-sulfide. Het mineraal marcasiet of speerkies is een ijzer-sulfide met de chemische formule FeS2. In de prehistorie werd het gebruikt als vuurstarter in combinatie met vuursteen. En die vuursteen vind je hier ook massaal.
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Select one of the most popular activities below or refine your search.
Discover the most beautiful and popular trails in the area, carefully bundled into appropriate selections.
Source: Pascal Brackman
Select one of the most popular categories below or be inspired by our selections.
Discover the most beautiful and popular attractions in the area, carefully bundled in appropriate selections.
Source: Pascal Brackman
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