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Picture description
(Arfvedsonite)
Na3Fe2+Al[OH|Si4O11]2
Crystal System: MonoclinikOrder: Silicate
Cleavage:  Complete - incorrolation with /11 O/surfaceLuster: Glassy
Fracture: IrreqularTransparency: Semi opaque - Dark (opaque)
Hardness type: BrittleMagnetic property: Does not have
Apparent formsJizman
Chemical propertiesChemical formula
Color: Dark gray - black - dark blueStreak: Blue gray - black
Distinctions with similar mineralsMineralogical similaritiesParagenesis
Genesis: Maqmatic (sienites) - pegmatiticCrystal shape: 
Uses: Habit: 
Others, Appellation Application
 
 
 
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Hardness
Min5.5
Max6
Density
Min3.4
Max0
 
 
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