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Topaz

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ATH1011903

Topaz

Description Tabs

Description
Locality: 
Spitzkopje Area, Karibib, Erongo Region, Namibia
Class: 
Single Crystal
Size Range: 
Thumbnail (1-3cm)
Size: 
2.3 × 2 × 1.2 cm
Description

An unusual etched topaz crystal from Spitzkoppe, Namibia.

The crystal is very clear - the transparency is only hindered by the rough head. However, the etched part also causes a strong glow in transmitted light.
 

Mineral Data
What's on the rock

Topaz

Formula: 
Al2(SiO4)(F,OH)2
Strunz: 
9.AF.35
Crystal System: 
Orthorhombic - Dipyramidal
Hardness: 
8.0
Streak: 
White

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