Under the Radar: Johan Maertens, Calcite Collector

Welcome to the thirteenth episode of Under the Radar where we feature outstanding members of the mineral community including collectors, dealers, artists, photographers, and more. Our next guest is Johan Maertens. He is a passionate calcite collector with a scientific focus on the matter. In this interview he talks about his new collecting phase, or rather DEcollecting, since he accumulated so much (knowledge about) calcite over the years. The host for the show is young collector and mineral photographer, Matthew Parshchikov from Cologne, Germany. This video was recorded mid 2025 ------------------------------------- Check out Johan here:   / johan.maertens.359     / maertenjs   Quiz: https://drive.google.com/file/d/1JXhA... Database template: https://docs.google.com/spreadsheets/... Our host Matthew: https://mpmineralphotography.com   / mathpphotos   ------------------------------------- This is a YMC Production. youngmineralcollectors.org