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Manganite

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GMN806351

Manganite

Description Tabs

Description
Locality: 
Úrkút Mine, Csárda Hill, Úrkút, Ajka, Veszprém County, Hungary
Class: 
Massive/Crystalline
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4 × 3.5 × 2.7 cm
Description

Very interesting manganese concretion from an abandoned manganese mine. These spheres were formed on the Jurassic deep seafloor.

Mineral Data
What's on the rock

Manganite

Formula: 
Mn3+O(OH)
Strunz: 
4.FD.15
Hardness: 
4.0
Type Locality: 
Manganese deposit, Ilfeld, Nordhausen, Harz, Thuringia, Germany

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