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Comments: Yellowish brown, roughly spherical aggregates of arseniosiderite crystals on matrix.
Location: Tsumeb mine, Tsumeb, Namibia.
Scale: Size Not Given.
© Lou Perloff / Photo Atlas of Minerals
Arseniosiderite: Ca2Fe+++3(AsO4)3O2ˇ3(H2O) Cobaltarthurite: CoFe+++2(AsO4)2(OH)2ˇ4(H2O)
Comments: Olive-greenish crystalline druse of cobaltarthurite with spherical arseniosiderite.
Location: Pastrana, Mazarrón, Murcia, Spain.
Scale: Picture size 1.3 mm.
© Thomas Witzke / Abraxas-Verlag