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Amethyst Quartz & K Feldspar

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RAF648407

Amethyst Quartz & K Feldspar

Gem Crystal

Description Tabs

Description
Locality: 
Brandberg, Dâures, Erongo Region, Namibia
Class: 
Crystals on Matrix
Size Range: 
Museum (18cm plus)
Size: 
90 × 9.5 × 6 cm
Largest Crystal: 
3.50cm
Weight: 
560.00gr
Description

A fine specimen of amethyst, quartz and k-feldspar crystals on matrix that came out from Brandberg.  Very good colour...

Mineral Data
What's on the rock

Amethyst

Variety Of: 

Quartz

Formula: 
SiO2
Strunz: 
4.DA.05
Hardness: 
7.0
Formula: 
SiO2
Hardness: 
0.0
Colour: 
Purple

Quartz

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

K Feldspar

Synonym Of: 

Microcline

Formula: 
KAlSi3O8
Strunz: 
9.FA.30
Hardness: 
6.0 - 6.5

Orthoclase

Formula: 
KAlSi3O8
Strunz: 
9.FA.30
Hardness: 
6.0

Sanidine

Formula: 
KAlSi3O8
Strunz: 
9.FA.30
Hardness: 
6.0