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Johannsenite

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RGR724225

Johannsenite

Description Tabs

Description
Locality: 
Madan, Smolyan Oblast, Bulgaria
Class: 
Massive/Crystalline
Size Range: 
Small cabinet (7-10 cm)
Size: 
8.5 × 6 × 1.5 cm
Description

Green grey prismatic johannsenite agregat. Historic sample.

Mineral Data
What's on the rock

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