Azurite, (w. Olivenite)

Chemistry: Cu3(CO3)2(OH)2
Size: 65 mm
Owner: Harvard University (Karabacek Collection)
Photographer: Malcolm Southwood

Elongated, tabular azurite crystals (to 4 mm) liberally scattered on olivenite.  At the surface, the olivenite is in the form of botryoidal sprays of acicular crystals, giving way to massive olivenite for much of the matrix.  A dusting of tiny spheres of pale blue-green rosasite (?) – or perhaps malachite (?) – covers the upper portion of the specimen as photographed.

This is specimen # 530 in the Karabacek Collection (MGMH # 103020), which dates it to the first oxidation zone.

Courtesy  of  the  Mineralogical  &  Geological  Museum  at  Harvard  University, Azurite; MGMH  ID# 103020, Tsumeb; Namibia. @ copyright 2012, President and Fellows of Harvard College. All rights reserved.