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Dumortierite

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SMM652212

Dumortierite

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Description
Locality: 
Santa Rosa Pit, Arequipa Province, Arequipa Department, Peru
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2 × 0.5 × 1 cm
Description

Radial groups of vinca-blue crystals of dumortierite on two specular samples.

Boxed with Label
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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