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Gahnite & Spessartine

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RHT779017

Gahnite & Spessartine

ex collection Holger Engelmohr
Classic Locality

Description Tabs

Description
Locality: 
Sterling Hill, Ogdensburg, Sussex County, New Jersey, United States of America
Class: 
Combination
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.3 × 5 × 4.4 cm
Weight: 
212.00gr
Description

Black-green gahnite and orange-brown spessartine on a brown mass, partially showing crystal surfaces (most probably augite).

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

Spessartine

Formula: 
Mn2+3Al2(SiO4)3
Strunz: 
9.AD.25
Crystal System: 
Isometric
Hardness: 
6.5 - 7.5
Streak: 
White
Type Locality: 
Sommer quarry, Wendelberg, Haibach, Aschaffenburg, Spessart, Franconia, Bavaria, Germany

Seller Information

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