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Aquamarine Siderite Feldspar Group & Schorl

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MGR831216

Aquamarine Siderite Feldspar Group & Schorl

Description Tabs

Description
Locality: 
Erongo Mountains, Karibib, Erongo Region, Namibia
Class: 
Combination
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.5 × 3.9 × 3 cm
Description

So this is really an sculptural assemble. At the base a lustrous, sharp schorl. On it a horizonatl smaller aquamarine and two diagonal well developed, lustrous aquamarine crystals - the lower one paralel inter-grown with an elongated feldspat crystal. The upper aquamarine crystal and the end-point of the schorl are both framed with dark red-brown siderite crystals. This is a crazy good combination and the assemble shows a lot of amazing details in various positions. No significant damages to report.

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

Siderite

Formula: 
FeCO3
Strunz: 
5.AB.05
Crystal System: 
Trigonal
Hardness: 
3.5 - 4.5
Streak: 
White

Schorl

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