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Ramsdellite

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ATM1096818

Description Tabs

Description
Locality: 
Monroe-Tener Mine, St. Louis County, Minnesota, United States of America
Class: 
Crystal Group/Cluster
Size Range: 
Small miniature (3-4.5 cm)
Size: 
2.3 × 3.6 × 2.85 cm
Largest Crystal: 
0.45cm
Description

Lustrous Black rare Manganese Oxide crystals most as interpenetrated in a massive cluster.  No matrix.  Boxed with label.

Ex George Fletcher collection.

Mineral Data
What's on the rock

Ramsdellite

Formula: 
Mn4+O2
Strunz: 
4.DB.15a
Crystal System: 
Orthorhombic
Hardness: 
3.0
Type Locality: 
Lake Valley District, Sierra Co., New Mexico, USA

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