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Dumortierite

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SHS72047

Dumortierite

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Description
Locality: 
Soavinadriana, Itasy, Madagascar
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.1 × 3.3 × 2.2 cm
Description

Blue dumortierite in matrix

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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