My research during a residency in 2020 at ISELP in Brussels gave me a first contact with the world of Belgian caves and geological collections. These geological samples contain an infinite number of narratives and my idea was to make these rocks speak through fictitious narratives in order to explore their longevity and to put human time into perspective with geological time. During my time at neimënster, I wish to deepen my research by exploring the geological collections of Luxembourg in order to cross scientific archives and fictitious stories and to open the interpretation of a specimen of collection to the multiple identities that it can contain through drawings, photographs, projections and stories.