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Mineralpedia Details for Polydymite

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Polydymite

Polydymite

Formula
Ni3S4 
Crystal System
Isometric 
Crystal Habit
Twinning Common, Massive - Granular, Octahedral Crystals 
Cleavage
Indistinct, None, None 
Luster
Metallic 
Color
violet gray, copper red, light gray, steel gray 
Streak
black gray 
Class
Isometric - Hexoctahedral 
Fracture
Conchoidal - Uneven 
Hardness
4.5-5.5 
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