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Spinel Var Gahnite

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TBM1043814

Spinel Var Gahnite

Classic Locality

Description Tabs

Description
Locality: 
Donna Angelica Valley, Tiriolo, Catanzaro Province, Calabria, Italy
Class: 
Crystal Group/Cluster
Size Range: 
Miniature (4.5-7 cm)
Size: 
4 × 5 × 3 cm
Largest Crystal: 
0.30cm
Weight: 
52.00gr
Description

Nice dark blue octahedral Spinel crystals up to 3 mm; very beautiful crystals of the rare Gahnite Spinel variety come from this locality

Mineral Data
What's on the rock

Spinel

Formula: 
MgAl2O4
Strunz: 
4.BB.05
Crystal System: 
Isometric
Hardness: 
7.5 - 8.0

Gahnite

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