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Muscovite Var Alurgite With Braunite

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TBM1134668

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Description
Locality: 
Praborna Mine, Saint-Marcel, Aosta Valley, Italy
Class: 
Crystal Group/Cluster
Size Range: 
Cabinet (10-18 cm)
Size: 
8 × 11 × 2.5 cm
Largest Crystal: 
0.40cm
Weight: 
372.00gr
Description

Very nice cluster of bright red Alurgite crystals up to 4 mm on cluster of bright metallic-gray Braunite crystals; aesthetic and uncommon specimen

Mineral Data
What's on the rock

Muscovite

Formula: 
KAl2(AlSi3O10)(OH)2
Strunz: 
9.EC.15
Hardness: 
2.5
Streak: 
White

Alurgite

Variety Of: 

Muscovite

Formula: 
KAl2(AlSi3O10)(OH)2
Strunz: 
9.EC.15
Hardness: 
2.5
Formula: 
K2(Mg,Al)4-5(Al,Si)8O20(OH)4
Hardness: 
0.0
Colour: 
Purple

Braunite

Formula: 
Mn2+Mn3+6(SiO4)O8
Strunz: 
9.AG.05
Hardness: 
6.0 - 6.5
Streak: 
Black
Type Locality: 
Oehrenstock (Öhrenstock), Langewiesen, Ilmenau District, Thuringian Forest, Thuringia, Germany

Current price

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10
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Start 22 Dec 18:00
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Shipping Information

Postage Area Price
ITALY
9.50
EUROPE ( AREA 1)
13.50
EUROPE ( AREA 1A)
19
USA
41
AMERICAN - UK - ASIA - AFRICA - OCEANIA ( AREA 2):
19
OCEANIA ( AREA 3):
21

Bid History

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