Formula: Na2Ca(SO4)2 sulphate
Specific gravity: 2.7 to 2.8
Hardness: 2½ to 3
Colour: Grey, colourless, yellowish, red
Solubility: Soluble in water
Glauberite occurs in dry salt-lake beds or marine evaporite deposits, generally in desert climates,
and in fumeroles. Glauberite dissolves in water, depositing
gypsum, so pseudomorphs of
glauberite are not uncommon
At Lake Crosbie, Victoria, Australia, glauberite occurs associated with halite and gypsum in black mud under a salt crust which covers the lake (AJM 10.1.17-18).
Camp Verde, Arizona, USA, is known for calcite pseudomorphs after glauberite. Gypsum pseudomorphs after glauberite are also found here (R&M 87.1.18, KL p190).
At Fanwood quarry, Union county, New Jersey, USA, prehnite pseudomorphs after glauberite have been found (KL p242).
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