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Tourmaline & Muscovite

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ESM753315

Tourmaline & Muscovite

Description Tabs

Description
Locality: 
Minas Gerais, Minas Gerais, Brazil
Class: 
Combination
Size Range: 
Small cabinet (7-10 cm)
Size: 
8 × 6 × 5 cm
Description

Bicolored tourmaline crystals on a muscovite matrix

 

Mineral Data
What's on the rock

Tourmaline

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

Muscovite

Formula: 
KAl2(AlSi3O10)(OH)2
Strunz: 
9.EC.15
Hardness: 
2.5
Streak: 
White