Home / Explore / Minerals / Melanarsite Minerals Melanarsite melanarsite K3Cu7Fe³⁺O4(AsO4)4 Melanarsite Mineral Specimen For Sale — via www.dakotamatrix.com · Source Overview Melanarsite is a mineral species (arsenate mineral). It crystallises in the monoclinic system. Scientific references Melanarsite — Wikidata. https://www.wikidata.org/wiki/Q19861014 Link