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Jacobsite & Iwakiite

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SHS174933

Jacobsite & Iwakiite

Description Tabs

Description
Locality: 
Gozaisho Mine, Iwaki City, Fukushima Prefecture, Honshu Island, Japan
Size Range: 
Thumbnail (1-3cm)
Size: 
1 × 0.7 × 0.7 cm
Description

Jakobsite and iwakite on matrix

Mineral Data
What's on the rock

Jacobsite

Formula: 
Mn2+Fe3+2O4
Strunz: 
4.BB.05
Crystal System: 
Isometric
Hardness: 
5.5 - 6.5
Type Locality: 
Jakobsberg Mine, Nordmark (Nordmarksberg), Filipstad, Värmland, Sweden

Iwakiite

Renamed To: 

Jacobsite-Q

Formula: 
T(Mn2+)M(Fe3+2)O4
Hardness: 
6 - 6.5
Formula: 
Mn2+Fe3+2O4
Strunz: 
4.BB.10
Crystal System: 
Tetragonal
Hardness: 
6.0 - 6.5
Type Locality: 
Gozaisho mine, Iwaki, Fukushima Prefecture, Tohoku Region, Honshu Island, Japan