Mineral Guide · Mineral
Blödite is a soft hydrated sodium magnesium sulphate found in evaporites, salt lakes and other arid saline environments.
Blödite is an evaporite mineral that records the chemistry of saline water as it concentrates and crystallises. Its pale appearance and water content make it sensitive to humidity.
The formula is Na2Mg(SO4)2·4H2O. Blödite crystallises in the monoclinic system, has low hardness and a low specific gravity typical of hydrated salts.
Blödite is usually colourless, white or grey and may form prismatic, tabular or granular crystals. Surfaces can show vitreous or pearly lustre, while weathered material may become dull and powdery.
It forms in saline lakes, evaporite sequences and salt-dome environments where sodium, magnesium and sulphate become concentrated. Occurrences are known from Spain, Germany, Russia, Central Asia, Chile and other arid regions.
Keep blödite in a dry, stable environment and avoid washing it. Because hydration can change the specimen, a label should record storage conditions and the exact locality whenever known.
Popular crystal guides may associate Blödite with Pisces or Cancer because of its connection with water and evaporite lakes. These links are poetic rather than scientific.
Esoteric descriptions may use blödite to represent preservation, concentration and cycles of water. The symbolism should not be presented as a physical or medical claim.
Reviewed by NotOnlyRocks Editorial Team
Last reviewed: 20 August 2026
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