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Chalcopyrite & Galena

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PDM832261

Chalcopyrite & Galena

Description Tabs

Description
Locality: 
Turt Mine, Negrești-Oas, Satu Mare County, Romania
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
7.1 × 4.5 × 2.4 cm
Description

Aggregate of sharp disphenoidal twinned crystals of chalcopyrite, partly tarnished, associated to cuboctahedral galena, with minor quartz and brown sphalerite in a matrix. The galena crystals are quite aerial, with rounded edges and some hollow faces. Chalcopyrite is partially etched with dull faces. Representative specimen from Turt. The general condition is very good.

Acquired in 1988 it is an Ex Roger Gnat specimen.

Mineral Data
What's on the rock

Chalcopyrite

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

Galena

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

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