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Dumortierite

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PDM905633

Dumortierite

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Description
Locality: 
Sahatany Valley, Ibity, Antsirabe II, Vakinankaratra, Madagascar
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.4 × 4.9 × 4 cm
Weight: 
97.00gr
Description

A metamorphic rock composed almost exclusively by blue fibrous dumortierite with minor translucent quartz, richly included by blue dumortierite.

Acquired in 1987, Ex Bruno Wyns #188.

Combine specimens to reduce shipping costs!.

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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