kiesésére

Kieserite is a mineral composed of hydrated magnesium sulfate, with the chemical formula MgSO₄·H₂O. It is a monoclinic mineral and is typically found in evaporate deposits. Kieserite is the monohydrate form of magnesium sulfate, distinguishing it from other hydrated sulfates like epsomite (MgSO₄·7H₂O).

The mineral is often colorless to white, though impurities can give it a yellowish or grayish hue. It has a vitreous luster and a Mohs hardness of 3 to 3.5. Kieserite is relatively soft and can be scratched with a knife. It is soluble in water and has a bitter taste.

Kieserite is primarily found in sedimentary rocks, particularly those formed from the evaporation of seawater or brine. Significant deposits occur in locations such as Germany, Spain, Poland, and the United States. It often forms in association with other evaporite minerals like halite, anhydrite, and carnallite.

Industrially, kieserite is a significant source of magnesium and sulfur. It is used in the production of fertilizers, providing essential nutrients for plant growth. It also finds applications in the chemical industry for the production of other magnesium compounds and in some industrial processes. Its agricultural use is particularly important as magnesium is a key component of chlorophyll.