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Feldspar Group Aquamarine & Hyalite

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MGR742334

Feldspar Group Aquamarine & Hyalite

Floater

Description Tabs

Description
Locality: 
Erongo Mountains, Karibib, Erongo Region, Namibia
Class: 
Combination
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.9 × 2 × 1.9 cm
Description

So far we all know Feldspat only as „matrix“ for Fluorite and Aqua, this one is a true Feldspat specimen. It shows an elongated main-crystal, some smaller ones are attached all around the base. The Feldspat is not dull - it is lustrous and snowy white. When you look at the top of the crystal you will see, that there is a little different color - a bit of yellow; that are some micro-crystals of Hyalite. At the left hand side there are 2 sharp and glossy Aquamarine crystals in light blue color. Feldspat is everywhere in the region, but there are not many well shaped crystals, at least no lustrous ones and not as elegant and aesthetic as this particular piece.

Mineral Data
What's on the rock

Aquamarine

Variety Of: 

Beryl

Formula: 
Be3Al2(Si6O18)
Strunz: 
9.CJ.05
Hardness: 
7.5 - 8.0
Formula: 
Be3Al2Si6O18
Hardness: 
0.0
Colour: 
Blue
Streak: 
White

Hyalite

Variety Of: 

Opal

Formula: 
SiO2·nH2O
Strunz: 
4.DA.10
Hardness: 
5.5 - 6.5
Formula: 
SiO2·nH2O
Hardness: 
5.5 - 6.5
Streak: 
white
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