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Groutite

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HCH140125

Groutite

Description Tabs

Description
Locality: 
Bülten-Adenstedt Mine, Ilsede, Peine District, Lower Saxony, Germany
Size Range: 
Miniature (4.5-7 cm)
Size: 
6 × 5 × 3 cm
Largest Crystal: 
0.30cm
Description

Groups of black Groutite crystals up to 3 mm large are sitting in a vug of Limonite.

Mineral Data
What's on the rock

Groutite

Formula: 
Mn3+O(OH)
Strunz: 
4.FD.10
Hardness: 
3.5 - 4.0
Type Locality: 
Sagamore Mangan No. 2 pit, Ironton, Cuyuna North Range, Crow Wing Co., Minnesota, USA

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