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Quartz On Plancheite

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PDM780488

Quartz On Plancheite

Description Tabs

Description
Locality: 
Kamoya, Kambove, Haut-Katanga, DR Congo
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.1 × 1.5 × 0.7 cm
Description

Crust of light blue plancheite with acicular crystals and a botryoidal surface because is coating an aggregate of scalenohedral calcite. On the surface there are isolated crystals or clusters of transparent quartz coloured blue due to plancheite inclusions. Nice aesthetic piece from the Kamoya mine, locality that is rarely represented in collections.

This old specimen, perfectly located because it was collected before 1968 by Martíal Borzee, a Belgian engineer to Congo.

Mineral Data
What's on the rock

Quartz

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

Plancheite

Formula: 
Cu8(Si8O22)(OH)4·H2O
Strunz: 
9.DB.35
Crystal System: 
Orthorhombic
Hardness: 
6.0
Type Locality: 
Sanda carriere (Sanda quarry; Sanda Mine), Mindouli, Mindouli District, Pool Department, Republic of Congo (Brazzaville)

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