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Neotocite

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LGM577298

Neotocite

Ex Dr. Krantz, Bonn, Germany
Classic Locality

Description Tabs

Description
Locality: 
Shidara-cho, Kita-Shidara-gun, Aichi Prefecture, Chubu Region, Honshu Island, Japan
Class: 
Massive/Crystalline
Size Range: 
Small cabinet (7-10 cm)
Size: 
5.5 × 7.5 × 5 cm
Weight: 
157.00gr
Description

This specimen consists of massive neotocite, the color is brown with a reddish hint, the luster is glassy to waxy.
Penwithite is an old synonym for neotocite, an amorphous to poorly crystalline, hydrated Mn silicate. A fine and quite large example of this uncommon manganese ore.

Probably the exact origin is the Taguchi mine, Shidara-cho, Kita-Shidara-gun, Aichi Prefecture - a long-abandoned manganese mine, now overgrown with forest.

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

Seller Information

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