Gaylussite
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Gaylussite is a carbonate mineral, a hydrated sodium calcium carbonate, formula Na2Ca2·5H2O. It occurs as translucent, vitreous white to grey to yellow monoclinic prismatic crystals. It is an unstable
Gaylussite 304155
Evaporite
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An evaporite is a water-soluble sedimentary mineral deposit caused by the concentration and crystallization that results when enough of the water solvent evaporates from an aqueous solution. There are
Gaylussite
…white to grey to yellow monoclinic prismatic crystals. It is an unstable mineral which dehydrates in dry air and decomposes in water. It is formed as an evaporite from alkali lacustrine waters. It also occurs rarely as veinlets in alkalic igneous rocks. It was first described in 1826 for an occurrence in Lagunillas…
Halite on wood from the Wieliczka salt mine, Poland. (Gallery of Mineralogy and Geology of the French National Museum of Natural History in Paris)
Anhydrite
Hopper crystal cast of halite in a Jurassic rock, Carmel Formation, southwestern Utah
Calcite