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Gahnite

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PDM820976

Gahnite

Rare Mineral

Description Tabs

Description
Locality: 
Okahua Farm 418, Windhoek Rural, Khomas Region, Namibia
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.6 × 3.6 × 3.1 cm
Largest Crystal: 
0.80cm
Description

Rich specimen of black lustrous octahedral crystals of gahnite in a matrix of phyllosilicates, probably phlogopite.

Acquired from Dierik Visser in 2007 by Chris Deroo.

Mineral Data
What's on the rock

Gahnite

Formula: 
ZnAl2O4
Strunz: 
4.BB.05
Crystal System: 
Isometric
Hardness: 
7.5 - 8.0
Streak: 
Grey
Type Locality: 
Falun mine, Falun, Dalarna, Sweden

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