Kieserite

kieserite

carnallite

polyhalite

leonite

Images

Formula: Mg(SO4).H2O
Hydrated normal sulphate, kieserite group, forms a solid solution series with szomolnokite
Specific gravity: 2.571
Hardness: 3½
Streak: White
Colour: Colourless, greyish white, yellowish, colourless in transmitted light
Environments

Evaporite deposits
Sublimates

Kieserite occurs typically in marine salt deposits, and rarely as a volcanic sublimate or efflorescence. Associated minerals include halite, carnallite, polyhalite, anhydrite, boracite, sulfoborite, leonite, epsomite and celestine (HOM)

Localities

At the type locality, Stassfurt, Stassfurt Potash deposit, Saxony-Anhalt, Germany, kieserite occurs in a salt deposit of oceanic origin, associated with halite (Mindat).

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