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Boulangerite In Fluorite With Siderite

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PMN748798

Boulangerite In Fluorite With Siderite

Description Tabs

Description
Locality: 
Bairendaba, Hexigten Banner, Ulanhad League, Inner Mongolia, China (Peoples Republic)
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
6 × 6 × 3 cm
Largest Crystal: 
2.00cm
Weight: 
109.00gr
Description

Oe of the pieces from the diverse vein of pyrrhotite ore found in the Bairendaba mine in Inner Mongolia this year. The fluorites are green with pruple phantoms and very lustrous, in this piece they are included by boulangerite needles and we also find siderite, muscovite, quartz and a small chalcopyrite crystals on the display face. A nice and sparkly piece.

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

Fluorite

Formula: 
CaF2
Strunz: 
3.AB.25
Crystal System: 
Isometric
Hardness: 
4.0
Streak: 
White
Type Locality: 
Jáchymov (St Joachimsthal), Jáchymov District (St Joachimsthal), Krušné Hory Mts (Erzgebirge), Karlovy Vary Region, Bohemia (Böhmen; Boehmen), Czech Republic

Siderite

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