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Quartz Psm Tourmaline

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CYF619337

Quartz Psm Tourmaline

Description Tabs

Description
Locality: 
Urubu mine, Monte Belo, Itinga, Minas Gerais, Brazil
Class: 
Single Crystal
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4 × 2.2 × 2 cm
Description

This tourmaline has the distintive bright lime green color for which this mine is well known for. The core of the crystal has been pseudomorphed to quartz and is twinned as well as terminated! The other end is contact terminated and displays a darker green band. There are also a few small rosettes of pale pink colored lepidolite scattered on the prism faces.  Very nice example of this material.

Mineral Data
What's on the rock

Quartz

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

Tourmaline

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