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Sphalerite On Galena

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PDM766789

Sphalerite On Galena

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Description
Locality: 
Naica, Saucillo Municipality, Chihuahua, Mexico
Class: 
Crystal Group/Cluster
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.1 × 5 × 2 cm
Description

Fine aggregate of black, well defined sphalerite crystals with superb lustre on glossy galena.

Ex. Dr. Bob Janssens specimen, #66.

Mineral Data
What's on the rock

Sphalerite

Formula: 
ZnS
Strunz: 
2.CB.05a
Crystal System: 
Isometric
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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