"Glauberite is a monoclinic sodium calcium sulfate mineral with the formula Na2Ca(SO4)2.
It was first described in 1808 for material from the El Castellar Mine, Villarrubia de Santiago, Toledo, Castile-La Mancha, Spain. It was named for the extracted Glauber´s salts after the German alchemist Johann Rudolf Glauber (1604–1668).
Glauberite often forms in continental and marine evaporite deposits, but may also form from hydrothermal deposits, as mineral sublimates deposited near fumaroles, in amygdules in basalt, and in nitrate deposits in arid climates. It occurs associated with halite, polyhalite, anhydrite, gypsum, thenardite, mirabilite, sassolite and blodite." - (en.wikipedia.org 02.07.2021)
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