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Dumortierite

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PDM642645

Dumortierite

Description Tabs

Description
Locality: 
Soavina, Ambatofinandrahana, Amoron'i Mania, Madagascar
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
7.5 × 5.6 × 3.3 cm
Description

A metamorphic rock composed almost exclusively by blue fibrous dumortierite from Soavina (Madagascar).

Acquired in 1974 by Gabriel Fauvart.

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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