Mededeelingen van 's Rijks Herbarium. Leiden, Rijks Universiteit, Rijks Herbarium, 1911-, Horsetails, The display features several large, textured geological specimens, each showcasing intricate patterns and striations that suggest a rich geological history. The pieces appear to have ancient surfaces, with detailed markings that indicate the processes of erosion or sedimentation over time. The arrangement highlights the unique shapes and contours, inviting viewers to appreciate the natural artistry formed through millennia. These specimens might come from a geological survey or collection, emphasizing the study of earth's formations and the story they tell about past environments.