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Muscovite var. fuchsite

#41239
SOLD
Muscovite from Bahia, Brazil - 41239
Muscovite from Bahia, Brazil - 41239

Muscovite var. fuchsite

#41239
Availability
Sold
Size
11.5 x 8 x 2.5 cm - Cabinet 
Formula
KAl2(Si3Al)O10(OH)2 (RRUFF)
Locality
Bahia, Brazil

This specimen is a large cabinet specimen with rich flashy green color exhibiting wavy foliations. It is a much richer green than appears in the photo.

Fuchsite is nothing but a Muscovite mica containing up to 4.8% chromiun (encycl. of Min.) imparting the green color and was originally described from Schwarzenstein in the Zillerthal and named after J. N. von Fuchs (Dana 6th Ed.).

Phyllosilicate - Monoclinic - Mica group member. Ordinary (True or Common) Mica - Dioctahderal. 

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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