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Dumortierite In Quartz

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PDM959827

Dumortierite In Quartz

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Description
Locality: 
Vaca Morta Quarry, Serra da Vereda, Boquira, Bahia, Brazil
Class: 
Single Crystal
Size Range: 
Thumbnail (1-3cm)
Size: 
1.9 × 0.9 × 0.6 cm
Description

Radial aggregates of acicular dumortierite crystals with intense glue colour and good transparency widely distributed in a terminated rock crystal quartz. The blue crystal core is overgrown by second generation of transparent quartz that creates a separated and attractive crust.

Found in 2017 it is an Ex. L. de Souza specimen.

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...

Quartz

Formula: 
SiO2
Strunz: 
4.DA.05
Crystal System: 
Trigonal
Hardness: 
7.0
Streak: 
White

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