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Siderite With Boulangerite

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TBM779819

Siderite With Boulangerite

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Description Tabs

Description
Locality: 
Gross Mine, Srebrenica, Tuzla Canton, Federation of Bosnia & Herzegovina, Bosnia and Herzegovina
Class: 
Crystal Group/Cluster
Size Range: 
Miniature (4.5-7 cm)
Size: 
4.4 × 5.2 × 1.7 cm
Weight: 
66.00gr
Description

Elegant lenticular crystals of bown yellow color finely intertwined grouped like a rose. The brown color  is caused by boulangerite which is included in siderite.

Mineral Data
What's on the rock

Siderite

Formula: 
FeCO3
Strunz: 
5.AB.05
Crystal System: 
Trigonal
Hardness: 
3.5 - 4.5
Streak: 
White

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