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Erythrite

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Erythrite, 5.7 cm, from the Bou Azzer District, Ouarzazate Province, Morocco. Erythrite, a cobalt arsenate, is easy to identify by its vibrant pink-purple color. It was known by the tribal people as a toxin and was used to poison insects and rats. This specimen is probably from Vein 7, which produced fine specimens in the 1960s and 1970s, considering that it was in the University collection before other fine examples were found in 2000. It is somewhat unusual with its nodular, radiating habit.

Product details

SpeciesErythrite
SizeSmall Cabinet
Dimensions5.7 cm
Added on02/13/2026
LocalityMorocco, Drâa-Tafilalet Region, Bou Azzer mining district
Publications
  • Mineralogical Record Mineral Collection University Of Delaware page 77
Current owner
The Mineralogical Museum, University of Delaware

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Erythrite
Mineral guide
Learn about Erythrite
vivid crimson-to-magenta acicular crystals, radiating sprays on calcite; prized for color, rarity, and historic Moroccan Bou Azzer finds.
Erythrite
Regional guide
Erythrite from Bou Azzer Mining District, Morocco
Bou Azzer Mining District, Morocco — renowned for erythrite and cobalt arsenides; vivid magenta blades, luster, and rarity prized by collectors.
Locality guide
Bou Azzer mining district
Bou Azzer mining district, Morocco - renowned for cobalt-rich ore and arsenide and carbonate specimens, with vivid erythrite and roselite prized by collectors.