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  • lezing geode zwijndrecht - belazeriet

    17-9: Lecture ‘Gem or Scam?’ for Geode Zwijndrecht

    Geode Zwijndrecht: Develsteincollege Develsingel 5, Zwijndrecht, Netherlands

    During the club meeting of Sept. 17, 2025, I will give a lecture on "Gem or Scam?" for Geode Geological Society in Zwijndrecht (NL). In…

  • lezing belazeriet of niet Zonhoven

    11-10: Lecture ‘Gem or Scam?’ for Geolithos

    Evenementenhal Den Dijk Rozenkransweg 4, Zonhoven, Belgium

    During a meeting of the Belgian geological society Geolithos on Oct. 11, 2025, I will give a lecture on "Gem or Scam?" at Evenementenhal Den…