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Arsenopyrite Manganoan Calcite Quartz & Boulangerite

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RSL1079289

Description Tabs

Description
Locality: 
Stan Terg Mine, Trepča, Mitrovica District, Kosovo
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
8.3 × 6.8 × 5.2 cm
Description

Good size specimen from this classic Kosovo mine. Matrix formed by arsenopyrite and pyrite crystals. Beautiful arsenopyrite crystals have grown on them with aggregates of manganoan calcite and quartz crystals. Some aggregates of metallic gray boulangerite can also be seen, but they may have other sulfides from the same group, which are called plumosite. A very bright and aesthetic specimen. Calcite is fluorescent under LW-UV.

Mineral Data
What's on the rock

Arsenopyrite

Formula: 
FeAsS
Strunz: 
2.EB.20
Crystal System: 
Monoclinic
Hardness: 
5.5 - 6.0

Manganoan Calcite

Variety Of: 

Calcite

Formula: 
CaCO3
Strunz: 
5.AB.05
Hardness: 
3.0
Formula: 
(Ca,Mn)CO3
Hardness: 
0.0

Quartz

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

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15
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