Home / Explore / Minerals / Rumseyite Minerals Rumseyite rumseyite [Pb2OF]Cl Rumseyite: Mineral information, data and localities. — via www.mindat.org · Source Overview Rumseyite is a mineral species (halide mineral). It crystallises in the tetragonal system. Scientific references Rumseyite — Wikidata. https://www.wikidata.org/wiki/Q19861246 Link