The stone called the desert rose.
This piece of chalk, called the desert rose, is a mineral formation that is a classic souvenir from desert areas.
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Desert rose is a sedimentary formation common in desert countries. With a color that ranges from orange to yellow-ochre, it is an aggregate of gypsum crystals that forms in very specific environmental and climatic conditions. The gypsum that makes up desert roses crystallizes in the monoclinic system in lens-shaped aggregates in flat crystals that are thinner at the ends.
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