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Tourmaline

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MGR671537

Tourmaline

Description Tabs

Description
Locality: 
Cruzeiro Mine, Doce Valley, Minas Gerais, Brazil
Class: 
Crystal Group/Cluster
Size Range: 
Small cabinet (7-10 cm)
Size: 
7.3 × 6.8 × 2.3 cm
Description

The specimen is formed like a "L", it consists of several intergrown crystals - all of them sharp terminated and glossy. The vertical crystals are dark green at the base, then they turn to intense blue and finally they show a very rare, sharp terminated intense red cap. Some areas (at the side in the middle) are covered with tiny crystals of second generation. Please note, that it doesn´t need backlight to show these spectacular internal colors. First photo was done under artificial light (compare-able to visual impression in a cabinet), second under daylight. The specimen is even more spectacular in person! The lower horizontal part on this Tourmaline-L is repaired, overal in excellent condition! 

Mineral Data
What's on the rock

Tourmaline

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