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 gypsum after
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 pseudomorphs of calcite after glauberite (R&M 87.1.18).
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