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Tourmaline & Quartz

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RBR116539

Tourmaline & Quartz

Description Tabs

Description
Locality: 
Pederneira Mine, São José da Safira, Minas Gerais, Brazil
Size Range: 
Miniature (4.5-7 cm)
Size: 
5 × 4 × 3 cm
Description

The tourmaline crystal is very glossy, nearly black at the base and becomes steel blue to the top, it is undamaged and sharp terminated. The matrix is a large quartz crystal (41mm across) with satiny luster. Very sweet assemble and fine combination.

Mineral Data
What's on the rock

Tourmaline

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

Quartz

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

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