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Cobaltoan Calcite Quartz & Heterogenite

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PDM614731

Cobaltoan Calcite Quartz & Heterogenite

Description Tabs

Description
Locality: 
Mindigi Mine, Kambove, Haut-Katanga, DR Congo
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.2 × 5.1 × 1.5 cm
Description

Even if calcite is very common in Katanga, these specimens from Mindingi are really very hard to find. It features light pink rounded crystals of cobaltoan calcite on transparent quartz crystals and a crust of white dolomite. Tiny black heterogenite aggregates are spotted on the calcite crystals, which is typical for the locality. From my own collection, I separated it from the collection of Robert Verdoodt.

Mr. Verdoodt was working in the laboratories of Union Minière du Haut-Katanga and evacuated to Belgium after the beginning of the Congo crisis in 1960.

Mineral Data
What's on the rock

Cobaltoan Calcite

Variety Of: 

Calcite

Formula: 
CaCO3
Strunz: 
5.AB.05
Hardness: 
3.0
Formula: 
(Ca,Co)CO3
Hardness: 
0.0

Quartz

Formula: 
SiO2
Strunz: 
4.DA.05
Crystal System: 
Trigonal
Hardness: 
7.0
Streak: 
White

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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