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Tourmaline & Epidote

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BMM638337

Tourmaline & Epidote

Description Tabs

Description
Locality: 
Adamant Mountains, Revelstoke, British Columbia, Canada
Class: 
Mixed Specimens
Size Range: 
Small cabinet (7-10 cm)
Size: 
9 × 4 × 2.8 cm
Description

Highly lustrous black tourmaline grown on quartz matrix. There are also some dark green epidote crystals in the quartz matrix. The big tourmaline is bent in the upper part. Unusual specimen from an unusual location!

Mineral Data
What's on the rock

Tourmaline

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

Epidote

Formula: 
{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Strunz: 
9.BG.05a
Crystal System: 
Monoclinic
Hardness: 
6.0
Streak: 
Colorless
Type Locality: 
Bourg d'Oisans, Isère, Rhône-Alpes, France...
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