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Magnetite & Quartz

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BMM594592

Magnetite & Quartz

New Discovery

Description Tabs

Description
Locality: 
Felber Valley, Mittersill, Zell am See District, Salzburg, Austria
Class: 
Crystal Group/Cluster
Size Range: 
Miniature (4.5-7 cm)
Size: 
4.7 × 4.3 × 4.2 cm
Description

4.7 x 4.3 x 4.2 cm

A very rare alpine specimen: magnetite as a rhombendodecahedron. The specimen comes from an interesting fund in 2009: For the first time in the Alpine area one found pieces of magnetite as rhombendodecahedron as a cleft mineral (see Lapis No. 9, 2010). Many highly lustrous magnetite crystals are grown on an etched quartz crystal. The magnetite shows partially tempering colors. Very interesting and rare specimen!

Mineral Data
What's on the rock

Magnetite

Formula: 
Fe2+Fe3+2O4
Strunz: 
4.BB.05
Crystal System: 
Isometric
Hardness: 
5.5 - 6.5
Streak: 
Black

Quartz

Formula: 
SiO2
Strunz: 
4.DA.05
Crystal System: 
Trigonal
Hardness: 
7.0
Streak: 
White