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Cordierite

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Cordierite

Description Tabs

Description
Locality: 
Tranomaro, Amboasary Sud, Anosy, Madagascar
Class: 
Massive/Crystalline
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.4 × 3.2 × 2.7 cm
Description

Nice specimen of deep violet-blue cordierite with visible pleochroism on translucence fragments from classic locality.

Mineral Data
What's on the rock

Cordierite

Formula: 
(Mg,Fe)2Al3(AlSi5O18)
Strunz: 
9.CJ.10
Crystal System: 
Orthorhombic
Hardness: 
7.0 - 7.5
Type Locality: 
Großer Arber, Bayerisch Eisenstein, Lower Bavaria, Bavaria, Germany

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