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Heterogenite With Malachite

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PDM716210

Heterogenite With Malachite

Description Tabs

Description
Locality: 
Kolwezi District, Lualaba, DR Congo
Class: 
Massive/Crystalline
Size Range: 
Small cabinet (7-10 cm)
Size: 
9.8 × 3.7 × 3 cm
Description

Block of carbonate rock with a layer of botryoidal malachite coated by black heterogenite. A surface was polished to expose the circular structure of concentrically grown multi-layered malachite.

Acquired in 1985, it is an Ex. Marcel Cromphout specimen (#655).

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

Malachite

Formula: 
Cu2(CO3)(OH)2
Strunz: 
5.BA.10
Crystal System: 
Monoclinic
Hardness: 
3.5 - 4.0

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