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Axinite-(Mn) & Johannsenite

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ESM526878

Axinite-(Mn) & Johannsenite

Description Tabs

Description
Locality: 
Iron Cap Mine, Black Peak, Gila County, Arizona, United States of America
Class: 
Combination
Size Range: 
Thumbnail (1-3cm)
Size: 
0.5 × 2.3 × 1.5 cm
Description

Lustrous green-brown axinite-(Mn) crystals on acicular johannsenite crystals

Mineral Data
What's on the rock

Axinite-(Mn)

Formula: 
Ca2Mn2+Al2BSi4O15(OH)
Strunz: 
9.BD.20
Hardness: 
6.5 - 7.0
Streak: 
White
Type Locality: 
Harz, Lower Saxony, Germany

Johannsenite

Formula: 
CaMn2+Si2O6
Group Parent: 
Clinopyroxene Subgroup
Strunz: 
9.DA.15
Hardness: 
6.0
Streak: 
white
Type Locality: 
Franklin Mine, Franklin, Franklin Mining District, Sussex Co., New Jersey, USA