Desert Rose (Barite)
Image: “Jon Zander (<a href="//commons.wikimedia.org/wiki/User:Digon3" title="User:Digon3">Digon3</a>)" (CC BY-SA 3.0)
Mineral NameDesert Rose (Barite)
Chemical FormulaBaSO4
Mohs Hardness3
Crystal Systemorthorhombic
Lustervitreous
Streak Colorwhite
Cleavageperfect on {001}, good on {210}, imperfect on {010}
Fractureuneven
Specific Gravity4.5
Colorstan, sandy brown, white
Transparencytranslucent
Type LocalitySahara Desert, Oklahoma (USA), Arizona (USA)
Mineral GroupSulfates
Usescollector's item, decorative
Associated Mineralsquartz, sand
Raritycommon
Description
This specimen is a sandy-colored desert rose, characterized by its rosette-like aggregation of platy barite crystals intergrown with sand grains, forming a rounded, flower-like shape.
Geological Context
Desert roses form in arid or semi-arid regions through the precipitation of barite in shallow evaporitic basins or sandy soils, where mineral-rich groundwater evaporates, allowing crystals to grow and incorporate surrounding sand grains.
