Home / Explore / Minerals / Ekaterinite Minerals Ekaterinite ekaterinite Ca2(B4O7)(Cl,OH)2 * 2H2O Ekaterinite Mineral Specimen For Sale — via www.dakotamatrix.com · Source Overview Ekaterinite is a mineral species (borate mineral). It crystallises in the hexagonal system. Nickel–Strunz class: 6.HO.40. Scientific references Ekaterinite — Wikidata. https://www.wikidata.org/wiki/Q3720811 Link