Topic summary
Kieserite
Kieserite, or magnesium sulfate monohydrate, is a hydrousmagnesium sulfate mineral with formula (MgSO4·H2O).
It has a vitreous luster and it is colorless, grayish-white or yellowish. Its hardness is 3.5 and crystallizes in the monocliniccrystal system. Gunningite is the zinc member of the kieserite group of minerals.