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Tourmaline Var Schorl

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PCZ521657

Tourmaline Var Schorl

Description Tabs

Description
Locality: 
Davib Ost Farm 61, Karibib, Erongo Region, Namibia
Class: 
Crystal Group/Cluster
Size Range: 
Thumbnail (1-3cm)
Size: 
2 × 1.8 × 1.5 cm
Description

An attractive little group of well terminated, reflective schorl crystals with quartz.

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
Peter Crozier Minerals