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Tourmaline

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Tourmaline

Description Tabs

Description
Locality: 
Minas Gerais, Brazil
Class: 
Single Crystal
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.7 × 3 × 2.7 cm
Description

A large bi-coloured tourmaline from Minas Gerais, Brazil. From an old collection. 

 

Mineral Data
What's on the rock

Tourmaline

Formula: 
A(D3)G6(T6O18)(BO3)3X3Z
Crystal System: 
Trigonal
Hardness: 
7