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Samtblende

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Samtblende

Classic Locality

Description Tabs

Description
Locality: 
Clara Mine, Oberwolfach, Freiburg Region, Baden-Württemberg, Germany
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2.7 × 2.4 × 2.3 cm
Description

rich specimen with many zone covered by beautiful orange needles of a variety of goethite named samtblende on matrix.

A fuzzy variety of goethite with a velvety luster created by carpets of microscopic acicular crystals forming crusts or balls. The name is derived from the German word for "velvet" and is often used for this variety in Germany and Bohemia.

For value the dimension of the crystals I remenber you that the photos of my specimens are taken at only 20/40 enlargement! 

Mineral Data
What's on the rock

Samtblende

Variety Of: 

Goethite

Formula: 
α-Fe3+O(OH)
Strunz: 
4.00.
Hardness: 
5.0 - 5.5

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