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Boulangerite Sphalerite & Quartz

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SER1146549

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Description
Locality: 
Cavnic Mine, Maramureș County, Romania
Class: 
Crystal Group/Cluster
Size Range: 
Cabinet (10-18 cm)
Size: 
11.1 × 7.1 × 6.1 cm
Description

a large display specimen featuring several brown sphalerite crystals on quartz and hundreds of twinned black bournonite crystlas ; a truly good large display specimen indeed

Mineral Data
What's on the rock

Boulangerite

Formula: 
Pb5Sb4S11
Strunz: 
2.HC.15
Crystal System: 
Monoclinic
Hardness: 
2.5 - 3.0
Colour: 
Lead grey
Streak: 
Brownish
Type Locality: 
Molières, Gard, Languedoc-Roussillon, France

Sphalerite

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

Quartz

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

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