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Muscovite var. fuchsite

#55484
SOLD
Muscovite from Placer Dome mine, Ontario, Canada - 55484
Muscovite from Placer Dome mine, Ontario, Canada - 55484

Muscovite var. fuchsite

#55484
Availability
Sold
Size
7 x 5 x 2 cm - Sm Cabinet 
Formula
KAl2(Si3Al)O10(OH)2 (RRUFF)
Locality
Placer Dome mine, Ontario, Canada

Green layers of fuchsite in schist matrix. This variety of Muscovite contains chromium which replaces the aluminum in the crystal structure. Chromium imparts the green color in fuchsite, but is not the cause of green in other phyllosilicates such as Chamosite or Clinochlore.

Muscovite

Formula
KAl2(Si3Al)O10(OH)2 
Crystal System
Monoclinic 
Crystal Habit
Massive - Lamellar, Foliated, Micaceous 
Cleavage
Perfect, None, None 
Luster
Vitreous (Glassy) 
Color
white, gray, silver white, brownish white, greenish white 
Streak
white 
Class
Monoclinic - Prismatic 
Fracture
Brittle - Sectile 
Hardness
2-2.5 

Data courtesy of Webmineral.

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