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Ilvaite Arsenopyrite & Magnetite

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RFJ912776

Ilvaite Arsenopyrite & Magnetite

Description Tabs

Description
Locality: 
Kitabira mine, Mine City, Yamaguchi Prefecture, Honshu Island, Japan
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.1 × 5.5 × 4.5 cm
Description

Interesting combination specimen, Ilvaite,Arsenopyrite and tiny Magnetite crystals on a massive Magnetite,Ilvaite matrix which also contains some Pyrrhotite.

Mineral Data
What's on the rock

Ilvaite

Formula: 
CaFe2+2Fe3+(Si2O7)O(OH)
Strunz: 
9.BE.07
Crystal System: 
Monoclinic
Hardness: 
5.5 - 6.0
Type Locality: 
Torre di Rio - Santa Filomena area (Monte della Torre), Rio Marina, Elba Island, Livorno Province, Tuscany, Italy

Arsenopyrite

Formula: 
FeAsS
Strunz: 
2.EB.20
Crystal System: 
Monoclinic
Hardness: 
5.5 - 6.0

Magnetite

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

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