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1 item @ $40.00  

Mineralpedia Details for Johnsomervilleite

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Johnsomervilleite

Johnsomervilleite

Formula
Na10Ca6Mg18Fe2+25(PO4)36 
Crystal System
Trigonal 
Crystal Habit
Granular, Dendritic, Colloform 
Cleavage
Perfect, None, None 
Luster
Vitreous (Glassy) 
Color
dark brown, blackish gray 
Streak
light brown 
Class
Trigonal - Rhombohedral 
Fracture
Brittle - Splintery 
Hardness
4.5 
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Johnsomervilleite from Sapucaia mine, Galileia, Doce valley, Minas Gerais, Brazil

Johnsomervilleite
            from Sapucaia mine, Galileia, Doce valley, Minas Gerais, Brazil

A small chip with resinous black Johnsomervilleite.

Click thumbnail images for larger view.

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