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Tourmaline Var Schorl

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PDM601457

Tourmaline Var Schorl

Description Tabs

Description
Locality: 
Itambacuri, Minas Gerais, Brazil
Class: 
Single Crystal
Size Range: 
Small cabinet (7-10 cm)
Size: 
7.2 × 0.8 × 0.8 cm
Description

Well formed prismatic crystal of black schorl tourmaline with a net undamaged termination, from a pegmatite field of the the Itambacuri region. The general condition is very good.

Ex. Dr. Gerard Vogel specimen, who obtained it in 1985 from Dr. L. Figueiredo-Tameirao.

Mineral Data
What's on the rock

Tourmaline

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

Schorl

Formula: 
Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Strunz: 
9.CK.05
Hardness: 
7.0

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