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Tourmaline

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ESM762544

Tourmaline

Description Tabs

Description
Locality: 
Morro Redondo Mine, Coronel Murta, Minas Gerais, Brazil
Class: 
Crystal Group/Cluster
Size Range: 
Small cabinet (7-10 cm)
Size: 
8 × 7 × 6 cm
Description

A group of dark olive-green tourmaline crystals

Mineral Data
What's on the rock

Tourmaline

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