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Dumortierite In Quartz

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PDM1031425

Dumortierite In Quartz

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Description
Locality: 
Vaca Morta Quarry, Serra da Vereda, Boquira, Bahia, Brazil
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2.2 × 1.3 × 0.8 cm
Description

Acicular dumortierite crystals of intense glue colour and good transparency widely distributed in a doubly-terminated rock crystal quartz, that shows two growth generations.

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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