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Heterogenite & Malachite On Chrysocolla

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PJM92916

Heterogenite & Malachite On Chrysocolla

Ex J & S Mommers Collection

Description Tabs

Description
Locality: 
Star of the Congo Mine, Lubumbashi, Haut-Katanga, DR Congo
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.5 × 2.9 × 2.4 cm
Description

A very attractive and unusually 3-dimensional plate of this great combo, with lustrous round aggregates of the heterogenite with dark green lustrous primary crystals of malachite perched atop starkly contrasting, matrix of pale blue chrysocolla.

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

Chrysocolla

Formula: 
Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (x < 1)
Strunz: 
9.ED.20
Crystal System: 
Monoclinic
Hardness: 
2.5 - 3.5
Earthstones Australia

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