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Tourmaline

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Tourmaline

Description Tabs

Description
Locality: 
Karibib District, Erongo Region, Namibia
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.3 × 2 × 1.8 cm
Largest Crystal: 
3.30cm
Description

Tourmaline, a translucent blue/green specimen. One can cut cabs out of it.  The photos taken shows torch light shining through two of them.

Mineral Data
What's on the rock

Tourmaline

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