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Biotite series

#PD34685
SOLD
Biotite from Kola Peninsula, Russia - PD34685
Biotite from Kola Peninsula, Russia - PD34685

Biotite series

#PD34685
Availability
Sold
Size
9 x 7 x 3 cm - Sm Cabinet 
Formula
Unavailable
Locality
Kola Peninsula, Russia

Phyllosilicate - Monoclinic - Mica group member. Ordinary (True or Common) Mica - Trioctahderal. For more information on Mica minerals and other phyllosilicates please reference our article - Click Here.

Large thick, very dark, thick cleavage chunck of "Biotite". This is good for a study piece in which you can breal off many cleavage planes.

Biotite

Formula
K(Mg,Fe++)3[AlSi3O10(OH,F)2 
Crystal System
Monoclinic 
Crystal Habit
Micaceous, Lamellar, Pseudo Hexagonal 
Cleavage
Perfect, None, None 
Luster
Vitreous - Pearly 
Color
dark brown, greenish brown, blackish brown, yellow, white 
Streak
gray 
Class
Monoclinic - Prismatic 
Fracture
Uneven 
Hardness
2.5-3 

Data courtesy of Webmineral.

Collection
Phillips Collection
Mineralpedia
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On Dakota Matrix
Previously Sold Biotite
On Dakota Matrix
Other Available Biotite
WebMineral
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Mindat
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