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Heterogenite

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BSM161453

Heterogenite

ex Philadelphia Academy of Natural Sciences #21644

Description Tabs

Description
Locality: 
Star of the Congo Mine, Lubumbashi, Haut-Katanga, DR Congo
Size Range: 
Cabinet (10-18 cm)
Size: 
11.1 × 9.5 × 7 cm
Description

 Lustrous black botryoidal mass with some iridescence and also at least three secondary copper minerals: one pale blue microcrystals forming spherules; bright green crystal sherules and dark green bladed crystals.  Best seen with a microscope but visible in the photographs.

Unfortunately I do not have a label for this specimen but it is reputed to be from the William S. Vaux Collection though may have been colllected by Samuel G. Gordon on his third expedition of 1925.

Mineral Data
What's on the rock

Heterogenite

Formula: 
CoO(OH)
Strunz: 
4.FE.20
Crystal System: 
Trigonal
Hardness: 
3.0 - 5.0
Type Locality: 
Wolfgang Maaßen Mine field, Schneeberg District, Erzgebirge, Saxony, Germany

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