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Euclase

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PDM571019

Euclase

Description Tabs

Description
Locality: 
Equador, Borborema Province, Rio Grande do Norte, Brazil
Class: 
Crystal Group/Cluster
Size Range: 
Thumbnail (1-3cm)
Size: 
1.7 × 1.4 × 1 cm
Largest Crystal: 
1.30cm
Description

A sample composed of two intergrown sharp euclase crystals from the famous Alto do Giz pegmatite in Brazil. They are well-formed with good lustre and striated along [100]. Both crystals have the characteristic blue "stripe" inside, that is more evident in the main one. The condition is very good and even the main euclase is crystallized at the side. The rear side of the specimen is contacted but not damaged (last two pictures). Scarce material and representative for the species and locality.

Acquired in 1995. Ex Bob Janssens #923.

Mineral Data
What's on the rock

Euclase

Formula: 
BeAl(SiO4)(OH)
Strunz: 
9.AE.10
Hardness: 
7.5
Streak: 
White
Type Locality: 
Ouro Preto, Iron Quadrangle, Minas Gerais, Brazil

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