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Dumortierite

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SYA1035511

Dumortierite

Description Tabs

Description
Locality: 
Sahatany Valley, Ibity, Antsirabe II, Vakinankaratra, Madagascar
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
5 × 3.5 × 1.7 cm
Largest Crystal: 
2.50cm
Description

Lustrous, intense blue dumortierite crystal up to 2.5 cm  on/in 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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