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Dumortierite

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SYA1022725

Dumortierite

Description Tabs

Description
Locality: 
Soavina, Ambatofinandrahana, Amoron'i Mania, Madagascar
Class: 
Massive/Crystalline
Size Range: 
Miniature (4.5-7 cm)
Size: 
6 × 5 × 2.5 cm
Description

All most pure mass of blue fibrous dumortierite crystals with very minor white quartz.

Mineral Data
What's on the rock

Dumortierite

Formula: 
(Al,Fe3+)7(SiO4)3(BO3)O3
Strunz: 
9.AJ.10
Crystal System: 
Orthorhombic
Hardness: 
7.0 - 8.0
Type Locality: 
Ducarre's Quarry, Beaunant, Chaponost, Rhône, Rhône-Alpes, France...

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