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Muscovite Quartz & Schorl

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RAF621327

Muscovite Quartz & Schorl

Classic Locality

Description Tabs

Description
Locality: 
Erongo Mountains, Karibib, Erongo Region, Namibia
Class: 
Crystal Group/Cluster
Size Range: 
Miniature (4.5-7 cm)
Size: 
6 × 3.5 × 3.5 cm
Largest Crystal: 
2.00cm
Weight: 
39.00gr
Description

A very fine grouping of muscovite quartz and schorl crystals from Erongo.   A nice combination.

Mineral Data
What's on the rock

Muscovite

Formula: 
KAl2(AlSi3O10)(OH)2
Strunz: 
9.EC.15
Hardness: 
2.5
Streak: 
White

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