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Dumortierite

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TBM885820

Dumortierite

Description Tabs

Description
Locality: 
Riampotsy, Itremo, Mangataboahangy, Ambatofinandrahana, Amoron'i Mania, Madagascar
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4 × 2.5 × 2 cm
Weight: 
22.00gr
Description

Bundles of blue radiated acicular crystals up to 12 mm long incorporated in the 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...