Home / Explore / Minerals / Itsiite Minerals Itsiite itsiite Ba2Ca(BSi2O7)2 Itsiite Mineral Specimen For Sale — via www.dakotamatrix.com · Source Overview Itsiite is a mineral species (cyclosilicate mineral). It crystallises in the tetragonal system. Scientific references Itsiite — Wikidata. https://www.wikidata.org/wiki/Q19860839 Link