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Ferro-Eckermannite

#BW58768

Ferro-Eckermannite

#BW58768
Availability
Sold
Size
4.5 x 4 x 1.8 cm - Miniature 
Formula
NaNa2(Fe2+4Al)Si8O22(OH)2 (RRUFF)
Locality
Norra Kärr, Gränna, Jönköping, Småland, Sweden

Dark green prismatic crystals embedded in a matrix with other amphiboles, namely Fluoro-leakite. Both of these minerals are members of a huge supergroup and are basically sodium amphiboles, a rock-forming mineral.

Ferro-eckermannite

Formula
NaNa2(Fe2+4Al)Si8O22(OH)2 
Crystal System
Monoclinic 
Color
green 
Class
Monoclinic - Prismatic 
Hardness
5-6 

Data courtesy of Webmineral.

Collection
Bill Wilson Collection

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