Image: <bdi><a href="https://www.wikidata.org/wiki/Q56247090" class="extiw" title="d:Q56247090"><span title="mineral collector and dealer">Robert M. Lavinsky</span></a></bdi> (CC BY-SA 3.0)
monoclinicuncommonArsenates
Erythrite
Co3(AsO4)2·8H2O
Erythrite typically forms as radiating aggregates of acicular (needle-like) to prismatic crystals, often in vibrant shades of crimson, pink, or peach-red, as seen in this specimen.
Erythrite Physical Properties
Mohs Hardness
2Crystal System
monoclinicLuster
pearlyStreak Color
pale red to reddish-pinkCleavage
perfect on {010}Fracture
unevenSpecific Gravity
3.1Colors
crimson, peach-red, pink, purple, colorlessTransparency
transparent to translucentType Locality
Bou Azzer District, Tazenakht, Ouarzazate Province, Souss-Massa-Draâ Region, MoroccoMineral Group
ArsenatesUses
collector's mineral, minor ore of cobaltAssociated Minerals
cobaltite, skutterudite, annabergite, native bismuth, arsenopyrite, quartz, calciteRarity
uncommonGeological Context
Erythrite is a secondary mineral that forms in the oxidation zones of cobalt-bearing arsenide deposits, resulting from the alteration of primary cobalt arsenide minerals.
