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Groutite

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MNT217040

Groutite

Classic Locality

Description Tabs

Description
Locality: 
Bülten-Adenstedt Mine, Ilsede, Peine District, Lower Saxony, Germany
Size Range: 
Miniature (4.5-7 cm)
Size: 
4.9 × 4.2 × 2.5 cm
Description

A real german classic: from the Bülten-Adenstedt mine comes this specimen of limonitic boulder ore with a lustrous black half-metallic shining aggregate of groutite crystals. This mine yielded the best groutite specimens of Europe (at least) and is closed since the 1970s.

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

Seller Information

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Seller's terms and conditions

Terms & Conditions

Thank you for your interest in my offers! Payment is possible via Paypal, bank transfer or cash if you pick up the item(s) personally. Bank data will be provided after settling the auction/transaction(s) if needed.

In case you are not happy with a specimen, you may send it back within 4 weeks. After receipt, i will refund the price minus shipping costs. Please inform me before sending an item back. If you have any questions (or maybe complaints) please feel free to contact me.

Best regards Roger