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Schalenblende With Galena Var Spinel Law & Chalcopyrite

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PCZ662603

Schalenblende With Galena Var Spinel Law & Chalcopyrite

Description Tabs

Description
Locality: 
Old Luganure Mine, Glendasan, County Wicklow, Irish Republic (Eire)
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
6 × 5.5 × 3 cm
Description

This is an interesting and beautiful etched specimen with a band of schalenblende with a parallel line of chalcopyrite crystals to one side. In addition are lovely galena crystals with the rare habit consisting of a pseudohexagonal tabular contact twin on {111}. A very unusual specimen from an uncommon locality. Displays equally well on both sides.

(L)

Mineral Data
What's on the rock

Schalenblende

Mixture Of: 

Sphalerite

Formula: 
ZnS
Strunz: 
2.CB.05a
Hardness: 
3.5 - 4.0

Wurtzite

Formula: 
(Zn,Fe)S
Strunz: 
2.CB.45
Hardness: 
3.5 - 4.0

Galena

Formula: 
PbS
Strunz: 
2.CD.10
Hardness: 
2.5

Galena

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

Chalcopyrite

Formula: 
CuFeS2
Strunz: 
2.CB.10a
Crystal System: 
Tetragonal
Hardness: 
3.5 - 4.0
Peter Crozier Minerals