Home / Explore / Minerals / Langisite Minerals Langisite langisite (Co,Ni)As Langisite Mineral Specimen For Sale — via www.dakotamatrix.com · Source Overview Langisite is a mineral species (cobalt arsenide mineral). It crystallises in the hexagonal system. Nickel–Strunz class: 2.CC.05. Scientific references Langisite — Wikidata. https://www.wikidata.org/wiki/Q3826891 Link