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Dumortierite In Quartz

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PDM873713

Dumortierite In Quartz

Floater

Description Tabs

Description
Locality: 
Vaca Morta Quarry, Serra da Vereda, Boquira, Bahia, Brazil
Class: 
Crystal Group/Cluster
Size Range: 
Thumbnail (1-3cm)
Size: 
2.7 × 0.9 × 0.8 cm
Description

Floater, doubly-terminated dull quartz crystal included by acicular dumortierite crystals of intense glue colour.

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

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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