Home / Explore / Minerals / Sarmientite Minerals Sarmientite sarmientite Fe³⁺2(AsO4)(SO4)(OH) * 5H2O Rare Aragonite Hilarionite Sarmientite Mineral Specimen, Greece - Etsy — via www.etsy.com · Source Overview Sarmientite is a mineral species (sulfate-arsenate mineral). Nickel–Strunz class: 8.DB.35. Scientific references Sarmientite — Wikidata. https://www.wikidata.org/wiki/Q3950569 Link