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Gitter Quartz & Schorl

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BEN882092

Gitter Quartz & Schorl

ex Charlie KEY specimen

Description Tabs

Description
Locality: 
Karibib District, Erongo Region, Namibia
Class: 
Crystal Group/Cluster
Size Range: 
Small cabinet (7-10 cm)
Size: 
7.7 × 5.8 × 5 cm
Description

Epitaxial growth of quartz on a very large orthoclase,now gone.The needle-like schorls have superb lustre.Very good condition. It seems to be a cluster of Japan law twins, but not. Scarce material.

Mineral Data
What's on the rock

Gitter Quartz

Variety Of: 

Quartz

Formula: 
SiO2
Strunz: 
4.DA.05
Hardness: 
7.0

Schorl

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

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