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Quartz & Schorl

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SMS1113032

Description Tabs

Description
Locality: 
Erongo Mountains, Karibib, Erongo Region, Namibia
Class: 
Crystal Group/Cluster
Size Range: 
Cabinet (10-18 cm)
Size: 
5.3 × 10.2 × 7 cm
Weight: 
193.78gr
Description

The specimen has an erratic spread of small slightly elongate crystals of quartz that are included of and are pierced by needles of schorl. The material is partly coated by a slurry residue of feldspar-like clay material.

Mineral Data
What's on the rock

Quartz

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

Schorl

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

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