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Braccoite

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FRE157511

Braccoite

New Mineral type

Description Tabs

Description
Locality: 
Valletta Mine, Aisone, Cuneo Province, Piedmont, Italy
Size Range: 
Thumbnail (1-3cm)
Size: 
0.5 × 2 × 2 cm
Description

Orange crystalline aggregates of braccoite coating hematitic matrix. Braccoite, (NaMn2+5[Si5As5+O17(OH)](OH) (IMA 2013-093) comes from an ancient mine located on the Cottian Alps (2500 m asl). Specimen very rich and representative for the species. Probed.

Mineral Data
What's on the rock

Braccoite

Formula: 
NaMn2+5[Si5As5+O17(OH)](OH)
Hardness: 
0.0
Type Locality: 
Valletta Mine (La Valletta Mine), Vallone della Valletta, Canosio, Maira Valley, Cuneo Province, Piedmont, Italy

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