Behold this stunning Erythrite specimen from Bou Azzer, Morocco.
— Geology Tweets (@GeologyTime) December 30, 2024
Photo by László Tóth. pic.twitter.com/2L98lj6r6g
Erythrite, known as "Cobalt Bloom," is a visually stunning mineral famous for its vibrant pink to purple hues. Specimens from Bou Azzer, Morocco, are particularly prized by collectors due to their vivid color and crystal quality. This rare mineral, a hydrated cobalt arsenate with the formula Co₃(AsO₄)₂·8H₂O, forms as a secondary product of cobalt-rich deposits.
Bou Azzer, situated in Morocco's Anti-Atlas Mountains, is renowned for its rich cobalt and arsenic mineral deposits. Erythrite in this region typically forms as acicular or tabular crystals in radial aggregates, often associated with other minerals like cobaltite, roselite, and quartz. The intense coloration of Bou Azzer specimens sets them apart, making them some of the most sought-after in the world.
Collectors value Bou Azzer erythrite for its striking appearance and scientific importance. These delicate specimens, with a Mohs hardness of 1.5–2.5, require careful handling and storage to maintain their beauty. Beyond their aesthetic appeal, they offer insights into the oxidation and weathering processes in cobalt-rich environments. Bou Azzer erythrite is not only a treasure for mineral enthusiasts but also a testament to the geological wonders of Morocco.
