mineral
Desert rose gypsum
Gypsum (CaSO₄·2H₂O), forming rosette aggregates with sand inclusions
AI-generated identification · may be incorrectTypically tan to reddish-brown, pearly to earthy luster, and bladed rosette crystals; Mohs hardness 2, with perfect cleavage and a monoclinic crystal system. The pictured specimen has characteristic radiating, petal-like blades and sandy coloration.
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Physical properties
Typically tan to reddish-brown, pearly to earthy luster, and bladed rosette crystals; Mohs hardness 2, with perfect cleavage and a monoclinic crystal system. The pictured specimen has characteristic radiating, petal-like blades and sandy coloration.
Formation & geological history
Forms in arid environments as gypsum crystallizes from evaporating saline groundwater, incorporating sand grains; these deposits may form over thousands to millions of years.
Uses & applications
Collected as a decorative mineral specimen and used in plaster, drywall, and cement; fragile crystals are generally unsuitable for jewelry.
Geological facts
Despite the name, desert rose is not a rock rose or fossil—the rosette shape develops as gypsum crystals grow around trapped sand.
Field identification & locations
Look for clustered, flattened blades radiating into flower-like forms, often with sand embedded between crystals. Common in desert evaporite deposits, including the Sahara, Mexico, and the southwestern United States.
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