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Tetrahedrite Galena Quartz & Calcite Psm Aragonite

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CLB90771

Tetrahedrite Galena Quartz & Calcite Psm Aragonite

Pseudomorph

Description Tabs

Description
Locality: 
Pachapaqui District, Bolognesi Province, Ancash Department, Peru
Size Range: 
Cabinet (10-18 cm)
Size: 
14.3 × 8.9 × 6 cm
Description

Excellent mirror-surface twinned tetrahedrite crystals, hoppered galena crystals, quartz and a pseudomorph of calcite after aragonite (?) - what else do you need?

There's some minor pyrite and sphalerite involved in the matrix of this fantastic specimen.

Mineral Data
What's on the rock

Tetrahedrite

Formula: 
Cu6[Cu4(Fe,Zn)2]Sb4S13
Strunz: 
2.GB.05
Hardness: 
3.5 - 4.0

Galena

Formula: 
PbS
Strunz: 
2.CD.10
Crystal System: 
Isometric
Hardness: 
2.5
Colour: 
Lead-grey
Streak: 
Lead-grey

Quartz

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

Calcite

Polymorph of: 
Formula: 
CaCO3
Strunz: 
5.AB.05
Crystal System: 
Trigonal
Hardness: 
3.0
Streak: 
White

Aragonite

Polymorph of: 
Formula: 
CaCO3
Strunz: 
5.AB.15
Crystal System: 
Hexagonal
Hardness: 
3.5 - 4.0
Type Locality: 
Gallo river, Molina de Aragón, Guadalajara, Castile-La Mancha, Spain

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