Kieserite
A variety of Minerals
What is Kieserite?
Kieserite is the magnesium sulfate mineral (MgSO4·H2O) and is named after Dietrich Georg von Kieser (Jena, Germany 1862). It has a vitreous luster and it is colorless, grayish-white or yellowish. Its hardness is 3.5 and crystallizes in the monoclinic crystal system. Gunningite is the zinc member of the kieserite group of minerals.
Uses & Applications
It is used in the production of Epsom salt and as a fertilizer, the overall global annual usage in agriculture in the mid 1970s was 2.3 million tons. Kieserite is also used for cleaning hard water deposits from tiles, stones, and other pool and fountain lining materials. Due to its hardness, which is greater than hard water deposits but less than tiles and other water feature linings, it is blasted at the hard water deposits to remove them.
Kieserite Market Value Calculator
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Kieserite Localities Map
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Key Characteristics
Formation of Kieserite
Kieserite commonly occurs in marine evaporites and rarely in volcanic environments as a sublimate. It occurs in association with halite, carnallite, polyhalite, anhydrite, boracite, sulfoborite, leonite, epsomite and celestine.
Quick Facts
Physical Properties
- Color
- Colourless, greyish-white, yellowish; colourless in transmitted light.
- Hardness (Mohs)
- 3.5
- Density
- 2.571 g/cm³
Chemical Properties
- Chemical Formula
- MgSO4 · H2O
- Elements
- H, Mg, O, S
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