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Alurgite

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NST701552

Alurgite

Description Tabs

Description
Locality: 
Praborna Mine, Saint-Marcel, Aosta Valley, Italy
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
7.5 × 7 × 3.3 cm
Description

A pegmatitic sample showing purplish Mn-bearing Muscovite var. Alurgite..

Mineral Data
What's on the rock

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