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Hercynite

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Watches:
JYJ617781

Hercynite

Description Tabs

Description
Locality: 
In den Dellen Quarries, Niedermendig, Mendig, Mayen-Koblenz, Rhineland-Palatinate, Germany
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
1.1 × 1.1 × 1 cm
Description

Black lustrous hercynite crystals on sanidine matrix. 

Beautiful! 

References:

Brauns, R., Die kristallinen Schiefer des Laacher See Gebietesund ihre Umbildung zu Sanidinit, Schweizerbart, Stuttgart, 1911

Mineral Data
What's on the rock

Hercynite

Formula: 
Fe2+Al2O4
Strunz: 
4.BB.05
Hardness: 
7.5
Type Locality: 
Poběžovice (Ronsperg; Ronsberg; Ronsperk), Plzeň Region, Bohemia (Böhmen; Boehmen), Czech Republic