Wiktionary
goslarite
n. (context mineral English) An orthorhombic-disphenoidal mineral containing hydrogen, oxygen, sulfur, and zinc.
Wikipedia
Goslarite
Goslarite is a hydrated zinc sulfate mineral (ZnSO·7(HO)) which was first found in the Rammelsberg mine, Goslar, Harz, Germany. It was described in 1847. Goslarite belongs to the epsomite group which also includes epsomite (MgSO·7HO) and morenosite (NiSO·7HO). Goslarite is an unstable mineral at the surface and will dehydrate to other minerals like bianchite (ZnSO·6HO), boyleite (ZnSO·4HO) and gunningite (ZnSO·HO).