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Magnetite With Magnesio-hastingsite

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TBM808737

Magnetite With Magnesio-hastingsite

Description Tabs

Description
Locality: 
Brosso Mine, Cálea, Léssolo, Torino Province, Piedmont, Italy
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
4 × 5.6 × 5.4 cm
Weight: 
187.00gr
Description

Beautiful group of perfectly formed crystals flanked by clumped aggregates of Magnesium-hastingsite. The largest crystal has a 10 mm side.

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

Magnesio-hastingsite

Formula: 
NaCa2(Mg4Fe3+)Si6Al2O22(OH)2
Group Parent: 
Hastingsite Root Name
Strunz: 
8/F.10-130
Crystal System: 
Monoclinic
Hardness: 
5 - 6
Colour: 
Green to brownish-green
Type Locality: 
Canadian National Railway tunnel, Mont Royal, Montréal, Québec, Canada