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Mineralpedia Details for Norrishite

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Norrishite

Norrishite

Formula
KLiMn3+2Si4O12 
Crystal System
Monoclinic 
Crystal Habit
Foliated, Massive 
Cleavage
Perfect, None, None 
Luster
Sub Metallic 
Color
brownish black, black 
Streak
light brown 
Class
Monoclinic - Prismatic 
Hardness
2.5 
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Norrishite from Hoskins mine, Grenfell, Forbes Co., New South Wales, Australia

Norrishite
            from Hoskins mine, Grenfell, Forbes Co., New South Wales, Australia
Special Info
Type Locality

Black micaceous crystals of Norrishite, a rare member of the Mica Group, associated with deep-red crystalline Braunite.

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