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Groutite

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CAM614440

Groutite

Classic Locality

Description Tabs

Description
Locality: 
Bülten-Adenstedt Mine, Ilsede, Peine District, Lower Saxony, Germany
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4 × 3 × 1.7 cm
Description

A German classic; groutite from the Emilie Mine (or Bulten-Adenstedt Mine). This specimen has a rich coverage of highly lustrous black groutite crystals in a vug in a manganese-oxide nodule.
An excellent piece.

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
Cartils Minerals

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