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Neotocite

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SHS118260

Neotocite

Description Tabs

Description
Locality: 
Noda-Tamagawa Mine, Noda-mura, Kunohe-gun, Iwate Prefecture, Honshu Island, Japan
Size Range: 
Thumbnail (1-3cm)
Size: 
2.8 × 2 × 0.8 cm
Description

Dark neotokite in matrix

Mineral Data
What's on the rock

Neotocite

Formula: 
(Mn,Fe,Mg)SiO3·H2O
Strunz: 
9.ED.20
Crystal System: 
Amorphous
Hardness: 
3.0 - 4.0
Colour: 
Brown Bronze or Black
Streak: 
Dark brown to black
Type Locality: 
Erik Ers Mine, Torsåker, Hofors, Gästrikland, Sweden