Home / Explore / Minerals / Downsite Minerals Downsite downsite K2(MoO3)3(SO4)·4H2O Bobdownsite Mineral Specimen For Sale — via www.dakotamatrix.com · Source Overview Downsite is a mineral species. It crystallises in the monoclinic system. Scientific references Downsite — Wikidata. https://www.wikidata.org/wiki/Q118119204 Link