A few months ago the author came across some prismatically coalesced pyrite (FeS2) crystals in a fluviatile deposit (graveldeposit) at Maasbracht. The strongly worn quartz block from which the crystals originate had been dredged up near Panheel, province of Limburg (The Netherlands), depth unknown. This article presents a brief description of the pyrite crystals as well as some notes on the findspot and its stratigraphy.