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Topaz

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MCH511637

Topaz

Description Tabs

Description
Locality: 
Grimsrudbukta, Hurum, Buskerud, Norway
Class: 
Single Crystal
Size Range: 
Thumbnail (1-3cm)
Size: 
1.2 × 1.2 × 0.6 cm
Description

A topaz crystal of beautiful, tender blue colour and with very good termination which is not often found at this greisen-type occurence. The crystal is not broken but had in parts contact to its host rock - proven by the presence of the typical striation on all the prism faces around.

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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