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Berzeliite & Cryptomelane

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SMM588344

Berzeliite & Cryptomelane

Rare Mineral

Description Tabs

Description
Locality: 
Montaldo Mine, Borgata Oberti, Cuneo Province, Piedmont, Italy
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4 × 3.5 × 2 cm
Description

Lemon-yellow, glassy, crystals of berzeliite, with metallic gray crystals of cryptomelane.

Boxed with Label
Mineral Data
What's on the rock

Berzeliite

Formula: 
NaCa2(Mg,Mn2+)2(AsO4)3
Strunz: 
8.AC.25
Crystal System: 
Isometric
Hardness: 
4.5 - 5.0
Type Locality: 
Långban, Filipstad, Värmland, Sweden

Cryptomelane

Formula: 
K(Mn4+7Mn3+)O16
Strunz: 
4.DK.05a
Crystal System: 
Tetragonal
Hardness: 
5.0 - 6.5
Type Locality: 
Tombstone, Tombstone District, Tombstone Hills, Cochise Co., Arizona, USA

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