mineral
Selentite
Gypsum (CaSO4 · 2H2O)
AI-generated identification · may be incorrectHardness of 2 on Mohs scale, white to colorless, pearly to vitreous luster, monoclinic crystal system, perfect cleavage, specific gravity of 2.3.
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Physical properties
Hardness of 2 on Mohs scale, white to colorless, pearly to vitreous luster, monoclinic crystal system, perfect cleavage, specific gravity of 2.3.
Formation & geological history
Formed through the evaporation of ancient saline bodies of water, primarily in sedimentary evaporite deposits.
Uses & applications
Used widely in decorative items, holistic crystal collections, and sometimes in interior gypsum products.
Geological facts
Selenite is a crystalline variety of the mineral gypsum and is remarkably soft, easily scratched with a fingernail.
Field identification & locations
Easily identified by its extreme softness and fibrous or bladed crystal habit; commonly found in Mexico, Morocco, and the USA.
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