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Brandtite On Armenite

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PJM148520

Brandtite On Armenite

Description Tabs

Description
Locality: 
Isenwegg, Wasen Alp, Simplon Pass, Brig, Valais, Switzerland
Size Range: 
Thumbnail (1-3cm)
Size: 
1.9 × 1.5 × 1 cm
Description

A pair of armenite crystals forming a "vee", the longest at 1.7cm, is huge for this rare species. The back of the specimen is covered with small brandtite crystals from this remote locale in the Wasen Alp

Mineral Data
What's on the rock

Brandtite

Formula: 
Ca2(Mn2+,Mg)(AsO4)2·2H2O
Strunz: 
8.CG.10
Crystal System: 
Monoclinic
Hardness: 
3.5
Type Locality: 
Harstigen Mine, Pajsberg, Persberg district, Filipstad, Värmland, Sweden

Armenite

Formula: 
BaCa2Al6Si9O30·2H2O
Strunz: 
9.CM.05
Crystal System: 
Orthorhombic
Hardness: 
7.5
Streak: 
White
Type Locality: 
Armen Mine, Overberget Mining Field, Kongsberg Silver Mining District, Kongsberg, Buskerud, Norway
Earthstones Australia

Seller Information

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