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Magnetite With Talc

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QRI679767

Magnetite With Talc

Classic Locality

Description Tabs

Description
Locality: 
Brosso Mine, Cálea, Léssolo, Torino Province, Piedmont, Italy
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
3.5 × 7.1 × 3.2 cm
Largest Crystal: 
0.60cm
Description

Rich specimen of jet black crystalline magnetite from the classic - although defunct - Brosso mine. A number of crystals lie in a vug of typical magnetite matrix, showing the growth patterns and interesting hoppered and hollow stuctures. Associated, there are small pale green hexagonal talc crystals which are best appreciated with 10x magnification.
These specimens typically occur associated to massive white calcite. This very specimen has been carefully etched from it.
A good specimen from this classic locality. Dated back to at least a decade ago.

 

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

Talc

Formula: 
Mg3(Si4O10)(OH)2
Strunz: 
9.EC.05
Crystal System: 
Triclinic
Hardness: 
1.0
Streak: 
White

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