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Azurite


Mineral: Azurite, Malachite
Chemistry: Cu3(CO3)2(OH)2
Size: 19 mm (see text)
Owner: Harvard University (W.Klein Collection)
Photographer: Malcolm Southwood

Three small azurite specimens share the same Harvard (# 111532) and Klein (# 149) collection numbers.  All are from 5 Level, but the contrasting habits suggest that they were probably from different occurrences:

    A.  An exquisite pair of sharp, lustrous, terminated blue-black azurite prisms on a little yellowish carbonate matrix. (19 mm specimen.)

    B.  A flattened blade-shaped crystal of highly translucent azurite (backlit in the photograph; 14 mm specimen).         

    C.  A single striated crystal of blue-black azurite on matrix, with a little malachite alteration at the base. (19 mm specimen.) 

Although there are a (very) few "fresh" azurites in the Klein collection from the open pit and from 3 and 4 Levels, it seems that unaltered azurite specimens first become abundant from 5 Level.

Courtesy  of  the  Mineralogical  &  Geological  Museum  at  Harvard  University,  Azurite; MGMH  ID# 111532, Tsumeb; Namibia. @ copyright 2012, President and Fellows of Harvard College. All rights reserved.