mineral

Desert Rose

Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O

Hardness: 2.0 (Mohs scale); Color: Tan, sandy brown, or white; Luster: Pearly to earthy; Crystal Structure: Monoclinic; Cleavage: Good in one direction but brittle; Specific Gravity: 2.3

Hardness: 2
Color: Tan, sandy brown, or white
Luster: Pearly to earthy

Identified May 17, 2026More mineral →

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Physical properties

Hardness: 2.0 (Mohs scale); Color: Tan, sandy brown, or white; Luster: Pearly to earthy; Crystal Structure: Monoclinic; Cleavage: Good in one direction but brittle; Specific Gravity: 2.3

Formation & geological history

Formed in arid sandy conditions through the evaporation of shallow salt basins. The crystals form circular patterns of flat plates that incorporate sand grains during growth. Most are from the Quaternary period.

Uses & applications

Primarily used as a decorative collector's specimen, in metaphysical practices, and occasionally as a source of gypsum for plaster.

Geological facts

The unique 'rose' shape is formed by the twinning of crystals. It is the official state rock of Oklahoma where it is found in the Garber Sandstone. It feels sandy to the touch because of the trapped sediment.

Field identification & locations

Identified by its distinctive rosette shape and soft, sandy texture. Commonly found in North Africa (Sahara), Mexico (Chihuahua), and the USA (Oklahoma and Arizona). Collectors should handle carefully as they are very fragile.

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