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Tourmaline & Calcite & Quartz

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RBR58847

Tourmaline & Calcite & Quartz

Description Tabs

Description
Locality: 
Malta Valley, Spittal an der Drau District, Carinthia, Austria
Size Range: 
Small cabinet (7-10 cm)
Size: 
9.5 × 7.5 × 7 cm
Description

A specimen of tourmaline, var. schorl, up to 10mm.  Yellow calcite, up to 10mm, and rock crystals, up to 15mm, are also present.

Mineral Data
What's on the rock

Tourmaline

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

Calcite

Polymorph of: 
Formula: 
CaCO3
Strunz: 
5.AB.05
Crystal System: 
Trigonal
Hardness: 
3.0
Streak: 
White

Quartz

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

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